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  1. Confluence Data Center
  2. CONFSERVER-61143

Simple PPTX file can cause OOME when using view powerpoint macro or from preview generation

      The fix for this bug has been released to our Long Term Support release.

      The fix for this bug is now available in the latest release of Confluence 7.13

      Issue Summary

      Attaching the following sample Powerpoint file samplepptx.pptx to a Confluence DC page. Confluence will be unable to generate a preview file.
      It is also affecting the Confluence Server instances and since there is no Sandboxing feature in Confluence Server, it crashed the application process.

      Steps to Reproduce

      1. Deploy Confluence DC with at least 2GB Max Heap Size
      2. Upload attached samplepptx.pptx
      3. Publish the page

      Expected Results

      1. Confluence kicks off the Sandbox process
      2. Moments later, the preview of the PPTX file should be generated

      The same attached PPTX file works seamlessly with the defaults of Confluence 7.9.3 DC

      Actual Results

      1. Confluence kicks off the Sandbox process
      2. Moments later, the back end atlassian-confluence.log will show the Sandbox crashing:
        2021-06-11 14:41:40,519 WARN [ForkJoinPool.commonPool-worker-11] [plugins.conversion.impl.FileSystemConversionState] markAsError Creating error file: /Users/myuser/shared-home/atlassian-confluence-7.11.2-dc/dcl-document/128/98/98378/98379_4.err
         -- url: /c7112/display/PD/test+page+7.11.2+PPTX+test | traceId: 18b2b85377047f3a | userName: admin | referer: http://localhost:27112/c7112/pages/resumedraft.action?draftId=98380&draftShareId=e2607d7a-c85e-4325-a30a-dc78ecceee0e&
        2021-06-11 14:41:43,542 WARN [sandbox-terminator] [impl.util.sandbox.DefaultSandboxPool] lambda$startTerminator$0 Request has taken 33142ms exceeds limit 30000ms terminating sandbox
         -- referer: http://localhost:27112/c7112/pages/resumedraft.action?draftId=98380&draftShareId=e2607d7a-c85e-4325-a30a-dc78ecceee0e& | url: /c7112/rest/tinymce/1/macro/placeholder | traceId: ab59ec8b71fb32fe | userName: admin
        2021-06-11 14:41:43,550 WARN [ForkJoinPool.commonPool-worker-11] [plugins.conversion.impl.LocalFileSystemConversionResultSupplier] lambda$performConversionInSandbox$2 Error when performing conversion com.atlassian.confluence.plugins.conversion.impl.LocalFileSystemConversionResultSupplier$3@4754d1b[attachment=/download/attachments/98378/samplepptx.pptx?version=4&modificationDate=1623385184310&api=v2,conversionType=DOCUMENT] in the sandbox
         -- url: /c7112/display/PD/test+page+7.11.2+PPTX+test | traceId: 18b2b85377047f3a | userName: admin | referer: http://localhost:27112/c7112/pages/resumedraft.action?draftId=98380&draftShareId=e2607d7a-c85e-4325-a30a-dc78ecceee0e&
        java.util.concurrent.CompletionException: com.atlassian.confluence.util.sandbox.SandboxTimeoutException: Sandbox request has been killed because it exceeded time limit of 30 seconds
        	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
        	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
        	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1592)
        	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        	at java.lang.Thread.run(Thread.java:748)
        Caused by: com.atlassian.confluence.util.sandbox.SandboxTimeoutException: Sandbox request has been killed because it exceeded time limit of 30 seconds
        	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.tryToThrowSpecificException(SandboxProcess.java:227)
        	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.execute(SandboxProcess.java:159)
        	at com.atlassian.confluence.impl.util.sandbox.DefaultSandboxPool.execute(DefaultSandboxPool.java:116)
        	at com.atlassian.confluence.impl.util.sandbox.ConfluenceSandboxPoolFactory$LazySandbox.execute(ConfluenceSandboxPoolFactory.java:72)
        	at com.atlassian.confluence.impl.util.sandbox.DefaultSandbox.execute(DefaultSandbox.java:41)
        	at com.atlassian.confluence.plugins.conversion.impl.sandbox.LocalDocumentConversionSandbox.execute(LocalDocumentConversionSandbox.java:66)
        	at com.atlassian.confluence.plugins.conversion.impl.sandbox.LocalDocumentConversionSandbox.execute(LocalDocumentConversionSandbox.java:59)
        	at com.atlassian.confluence.plugins.conversion.impl.sandbox.DelegatingDocumentConversionSandbox.execute(DelegatingDocumentConversionSandbox.java:47)
        	at com.atlassian.confluence.plugins.conversion.impl.LocalFileSystemConversionResultSupplier.lambda$performConversionInSandbox$1(LocalFileSystemConversionResultSupplier.java:279)
        	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1590)
        	... 3 more
        Caused by: java.io.IOException: Stream closed
        	at java.io.BufferedInputStream.getBufIfOpen(BufferedInputStream.java:170)
        	at java.io.BufferedInputStream.fill(BufferedInputStream.java:214)
        	at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
        	at java.io.DataInputStream.readInt(DataInputStream.java:388)
        	at com.atlassian.confluence.impl.util.sandbox.SandboxMessage.receiveMessage(SandboxMessage.java:42)
        	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.receiveMessage(SandboxProcess.java:283)
        	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.execute(SandboxProcess.java:156)
        	... 11 more
        
      3. Even after adding -Ddocument.conversion.sandbox.request.time.limit.secs=1800 as JVM flag, the sandbox still crashes with:
        2021-06-11 15:20:16,346 WARN [http-nio-27122-exec-2] [org.springframework.beans.GenericTypeAwarePropertyDescriptor] getWriteMethodForActualAccess Invalid JavaBean property 'contentPermissionManager' being accessed! Ambiguous write methods found next to actually used [public void com.adaptavist.confluence.naturalchildren.NaturalChildrenAction.setContentPermissionManager(com.atlassian.confluence.internal.ContentPermissionManagerInternal)]: [public void com.atlassian.confluence.pages.actions.AbstractPageAwareAction.setContentPermissionManager(com.atlassian.confluence.core.ContentPermissionManager)]
         -- referer: http://localhost:27122/c7122/display/PD/test+123 | url: /c7122/plugins/pagetree/naturalchildren.action | traceId: 9b50d45349f2ce0a | userName: admin
        2021-06-11 15:20:36,248 WARN [document-conversion-sandbox-launcher-4] [impl.util.sandbox.SandboxProcess] startIfDead Sandbox 1 has died
         -- referer: http://localhost:27122/c7122/display/PD/test+123?preview=/98371/98378/samplepptx.pptx | url: /c7122/rest/documentConversion/0.1/conversion/convert/98378/1 | traceId: 0604643fdfd99b15 | userName: admin
        2021-06-11 15:20:36,249 WARN [document-conversion-sandbox-launcher-4] [impl.util.sandbox.SandboxProcess] startIfDead Attempting to restart the sandbox 1
         -- referer: http://localhost:27122/c7122/display/PD/test+123?preview=/98371/98378/samplepptx.pptx | url: /c7122/rest/documentConversion/0.1/conversion/convert/98378/1 | traceId: 0604643fdfd99b15 | userName: admin
        2021-06-11 15:20:36,274 WARN [ForkJoinPool.commonPool-worker-9] [plugins.conversion.impl.LocalFileSystemConversionResultSupplier] lambda$performConversionInSandbox$2 Error when performing conversion com.atlassian.confluence.plugins.conversion.impl.LocalFileSystemConversionResultSupplier$3@2a994e19[attachment=/download/attachments/98371/samplepptx.pptx?version=1&modificationDate=1623388561452&api=v2,conversionType=THUMBNAIL] in the sandbox
         -- url: /c7122/ | traceId: ee5c9c4e7412ddd5 | userName: admin
        java.util.concurrent.CompletionException: com.atlassian.confluence.util.sandbox.SandboxCrashedException: Sandbox has crashed while serving the request
        	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
        	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
        	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1592)
        	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        	at java.lang.Thread.run(Thread.java:748)
        Caused by: com.atlassian.confluence.util.sandbox.SandboxCrashedException: Sandbox has crashed while serving the request
        	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.tryToThrowSpecificException(SandboxProcess.java:230)
        	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.execute(SandboxProcess.java:159)
        	at com.atlassian.confluence.impl.util.sandbox.DefaultSandboxPool.execute(DefaultSandboxPool.java:116)
        	at com.atlassian.confluence.impl.util.sandbox.ConfluenceSandboxPoolFactory$LazySandbox.execute(ConfluenceSandboxPoolFactory.java:72)
        	at com.atlassian.confluence.impl.util.sandbox.DefaultSandbox.execute(DefaultSandbox.java:41)
        	at com.atlassian.confluence.plugins.conversion.impl.sandbox.LocalDocumentConversionSandbox.execute(LocalDocumentConversionSandbox.java:66)
        	at com.atlassian.confluence.plugins.conversion.impl.sandbox.LocalDocumentConversionSandbox.execute(LocalDocumentConversionSandbox.java:59)
        	at com.atlassian.confluence.plugins.conversion.impl.sandbox.DelegatingDocumentConversionSandbox.execute(DelegatingDocumentConversionSandbox.java:47)
        	at com.atlassian.confluence.plugins.conversion.impl.LocalFileSystemConversionResultSupplier.lambda$performConversionInSandbox$1(LocalFileSystemConversionResultSupplier.java:227)
        	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1590)
        	... 3 more
        Caused by: java.io.EOFException
        	at java.io.DataInputStream.readInt(DataInputStream.java:392)
        	at com.atlassian.confluence.impl.util.sandbox.SandboxMessage.receiveMessage(SandboxMessage.java:42)
        	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.receiveMessage(SandboxProcess.java:283)
        	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.execute(SandboxProcess.java:156)
        	... 11 more
        

      Diagnosis

      Enabling com.atlassian.confluence.impl.util DEBUG shows:

      2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
      2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.internal.e9.void.toArray(Unknown Source)
      2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.internal.mb.try.if(Unknown Source)
      2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.internal.e7.new.do(Unknown Source)
      2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.internal.n4.implements.do(Unknown Source)
      2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.internal.n7.final.do(Unknown Source)
      2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.internal.n7.final.do(Unknown Source)
      2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.internal.n7.final.do(Unknown Source)
      2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.FontsLoader.do(Unknown Source)
      2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.FontsLoader.loadExternalFonts(Unknown Source)
      2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.atlassian.plugins.conversion.AsposeUtils.configureFonts(AsposeUtils.java:117)
      2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.atlassian.plugins.conversion.AsposeAware.<clinit>(AsposeAware.java:6)
      2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.atlassian.plugins.conversion.sandbox.SandboxConversionTask.<clinit>(SandboxConversionTask.java:33)
      2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at java.lang.Class.forName0(Native Method)
      2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at java.lang.Class.forName(Class.java:348)
      2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.atlassian.confluence.impl.util.sandbox.SandboxServer.createTask(SandboxServer.java:81)
      2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.atlassian.confluence.impl.util.sandbox.SandboxServer.run(SandboxServer.java:60)
      2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.atlassian.confluence.impl.util.sandbox.SandboxServer.main(SandboxServer.java:121)
      2021-06-11 15:47:36,262 WARN [document-conversion-sandbox-launcher-1] [impl.util.sandbox.SandboxProcess] startIfDead Sandbox 0 has died
      
      • Increasing the Sandbox memory to 4GB didn't help - still crashes with out of memory
        -Dconversion.sandbox.memory.limit.megabytes=4096
        
      • Increasing the Sandbox memory to 8GB seemed to do the trick!
        -Dconversion.sandbox.memory.limit.megabytes=8192
        

      Alternative symptom: View file macro doesn't load:

      Caused by: java.lang.OutOfMemoryError: Java heap space
              at com.aspose.slides.internal.e9.void.toArray(Unknown Source)
              at com.aspose.slides.internal.mb.try.if(Unknown Source)
              at com.aspose.slides.internal.e7.new.do(Unknown Source)
              at com.aspose.slides.internal.n4.implements.do(Unknown Source)
              at com.aspose.slides.internal.n7.final.do(Unknown Source)
              at com.aspose.slides.internal.n7.case.if(Unknown Source)
              at com.aspose.slides.internal.n7.else.do(Unknown Source)
              at com.aspose.slides.internal.n7.else.do(Unknown Source)
              at com.aspose.slides.internal.n7.else.else(Unknown Source)
              at com.aspose.slides.internal.n7.else.byte(Unknown Source)
              at com.aspose.slides.internal.n7.case.do(Unknown Source)
              at com.aspose.slides.o6.do(Unknown Source)
              at com.aspose.slides.o6.do(Unknown Source)
              at com.aspose.slides.o6.do(Unknown Source)
              at com.aspose.slides.ok.do(Unknown Source)
              at com.aspose.slides.ok.do(Unknown Source)
      

      Workaround

      Try adding these JVM flags and restart Confluence:

      -Ddocument.conversion.sandbox.request.time.limit.secs=300
      -Dconversion.sandbox.memory.limit.megabytes=8192
      -Dconversion.sandbox.java.options="-Dconfluence.document.conversion.slides.convert.timeout=300"
      

      See Configuring System Properties for more details

      • (not recommended) Try removing unused fonts from OS.

        1. Powerpoint File.pptx
          33 kB
        2. samplepptx.pptx
          404 kB
        3. screenshot-1.png
          screenshot-1.png
          18 kB

            Loading...
            IMPORTANT: JAC is a Public system and anyone on the internet will be able to view the data in the created JAC tickets. Please don’t include Customer or Sensitive data in the JAC ticket.
            Uploaded image for project: 'Confluence Data Center'
            1. Confluence Data Center
            2. CONFSERVER-61143

            Simple PPTX file can cause OOME when using view powerpoint macro or from preview generation

                The fix for this bug has been released to our Long Term Support release.

                The fix for this bug is now available in the latest release of Confluence 7.13

                Issue Summary

                Attaching the following sample Powerpoint file samplepptx.pptx to a Confluence DC page. Confluence will be unable to generate a preview file.
                It is also affecting the Confluence Server instances and since there is no Sandboxing feature in Confluence Server, it crashed the application process.

                Steps to Reproduce

                1. Deploy Confluence DC with at least 2GB Max Heap Size
                2. Upload attached samplepptx.pptx
                3. Publish the page

                Expected Results

                1. Confluence kicks off the Sandbox process
                2. Moments later, the preview of the PPTX file should be generated

                The same attached PPTX file works seamlessly with the defaults of Confluence 7.9.3 DC

                Actual Results

                1. Confluence kicks off the Sandbox process
                2. Moments later, the back end atlassian-confluence.log will show the Sandbox crashing:
                  2021-06-11 14:41:40,519 WARN [ForkJoinPool.commonPool-worker-11] [plugins.conversion.impl.FileSystemConversionState] markAsError Creating error file: /Users/myuser/shared-home/atlassian-confluence-7.11.2-dc/dcl-document/128/98/98378/98379_4.err
                   -- url: /c7112/display/PD/test+page+7.11.2+PPTX+test | traceId: 18b2b85377047f3a | userName: admin | referer: http://localhost:27112/c7112/pages/resumedraft.action?draftId=98380&draftShareId=e2607d7a-c85e-4325-a30a-dc78ecceee0e&
                  2021-06-11 14:41:43,542 WARN [sandbox-terminator] [impl.util.sandbox.DefaultSandboxPool] lambda$startTerminator$0 Request has taken 33142ms exceeds limit 30000ms terminating sandbox
                   -- referer: http://localhost:27112/c7112/pages/resumedraft.action?draftId=98380&draftShareId=e2607d7a-c85e-4325-a30a-dc78ecceee0e& | url: /c7112/rest/tinymce/1/macro/placeholder | traceId: ab59ec8b71fb32fe | userName: admin
                  2021-06-11 14:41:43,550 WARN [ForkJoinPool.commonPool-worker-11] [plugins.conversion.impl.LocalFileSystemConversionResultSupplier] lambda$performConversionInSandbox$2 Error when performing conversion com.atlassian.confluence.plugins.conversion.impl.LocalFileSystemConversionResultSupplier$3@4754d1b[attachment=/download/attachments/98378/samplepptx.pptx?version=4&modificationDate=1623385184310&api=v2,conversionType=DOCUMENT] in the sandbox
                   -- url: /c7112/display/PD/test+page+7.11.2+PPTX+test | traceId: 18b2b85377047f3a | userName: admin | referer: http://localhost:27112/c7112/pages/resumedraft.action?draftId=98380&draftShareId=e2607d7a-c85e-4325-a30a-dc78ecceee0e&
                  java.util.concurrent.CompletionException: com.atlassian.confluence.util.sandbox.SandboxTimeoutException: Sandbox request has been killed because it exceeded time limit of 30 seconds
                  	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
                  	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
                  	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1592)
                  	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
                  	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
                  	at java.lang.Thread.run(Thread.java:748)
                  Caused by: com.atlassian.confluence.util.sandbox.SandboxTimeoutException: Sandbox request has been killed because it exceeded time limit of 30 seconds
                  	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.tryToThrowSpecificException(SandboxProcess.java:227)
                  	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.execute(SandboxProcess.java:159)
                  	at com.atlassian.confluence.impl.util.sandbox.DefaultSandboxPool.execute(DefaultSandboxPool.java:116)
                  	at com.atlassian.confluence.impl.util.sandbox.ConfluenceSandboxPoolFactory$LazySandbox.execute(ConfluenceSandboxPoolFactory.java:72)
                  	at com.atlassian.confluence.impl.util.sandbox.DefaultSandbox.execute(DefaultSandbox.java:41)
                  	at com.atlassian.confluence.plugins.conversion.impl.sandbox.LocalDocumentConversionSandbox.execute(LocalDocumentConversionSandbox.java:66)
                  	at com.atlassian.confluence.plugins.conversion.impl.sandbox.LocalDocumentConversionSandbox.execute(LocalDocumentConversionSandbox.java:59)
                  	at com.atlassian.confluence.plugins.conversion.impl.sandbox.DelegatingDocumentConversionSandbox.execute(DelegatingDocumentConversionSandbox.java:47)
                  	at com.atlassian.confluence.plugins.conversion.impl.LocalFileSystemConversionResultSupplier.lambda$performConversionInSandbox$1(LocalFileSystemConversionResultSupplier.java:279)
                  	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1590)
                  	... 3 more
                  Caused by: java.io.IOException: Stream closed
                  	at java.io.BufferedInputStream.getBufIfOpen(BufferedInputStream.java:170)
                  	at java.io.BufferedInputStream.fill(BufferedInputStream.java:214)
                  	at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
                  	at java.io.DataInputStream.readInt(DataInputStream.java:388)
                  	at com.atlassian.confluence.impl.util.sandbox.SandboxMessage.receiveMessage(SandboxMessage.java:42)
                  	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.receiveMessage(SandboxProcess.java:283)
                  	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.execute(SandboxProcess.java:156)
                  	... 11 more
                  
                3. Even after adding -Ddocument.conversion.sandbox.request.time.limit.secs=1800 as JVM flag, the sandbox still crashes with:
                  2021-06-11 15:20:16,346 WARN [http-nio-27122-exec-2] [org.springframework.beans.GenericTypeAwarePropertyDescriptor] getWriteMethodForActualAccess Invalid JavaBean property 'contentPermissionManager' being accessed! Ambiguous write methods found next to actually used [public void com.adaptavist.confluence.naturalchildren.NaturalChildrenAction.setContentPermissionManager(com.atlassian.confluence.internal.ContentPermissionManagerInternal)]: [public void com.atlassian.confluence.pages.actions.AbstractPageAwareAction.setContentPermissionManager(com.atlassian.confluence.core.ContentPermissionManager)]
                   -- referer: http://localhost:27122/c7122/display/PD/test+123 | url: /c7122/plugins/pagetree/naturalchildren.action | traceId: 9b50d45349f2ce0a | userName: admin
                  2021-06-11 15:20:36,248 WARN [document-conversion-sandbox-launcher-4] [impl.util.sandbox.SandboxProcess] startIfDead Sandbox 1 has died
                   -- referer: http://localhost:27122/c7122/display/PD/test+123?preview=/98371/98378/samplepptx.pptx | url: /c7122/rest/documentConversion/0.1/conversion/convert/98378/1 | traceId: 0604643fdfd99b15 | userName: admin
                  2021-06-11 15:20:36,249 WARN [document-conversion-sandbox-launcher-4] [impl.util.sandbox.SandboxProcess] startIfDead Attempting to restart the sandbox 1
                   -- referer: http://localhost:27122/c7122/display/PD/test+123?preview=/98371/98378/samplepptx.pptx | url: /c7122/rest/documentConversion/0.1/conversion/convert/98378/1 | traceId: 0604643fdfd99b15 | userName: admin
                  2021-06-11 15:20:36,274 WARN [ForkJoinPool.commonPool-worker-9] [plugins.conversion.impl.LocalFileSystemConversionResultSupplier] lambda$performConversionInSandbox$2 Error when performing conversion com.atlassian.confluence.plugins.conversion.impl.LocalFileSystemConversionResultSupplier$3@2a994e19[attachment=/download/attachments/98371/samplepptx.pptx?version=1&modificationDate=1623388561452&api=v2,conversionType=THUMBNAIL] in the sandbox
                   -- url: /c7122/ | traceId: ee5c9c4e7412ddd5 | userName: admin
                  java.util.concurrent.CompletionException: com.atlassian.confluence.util.sandbox.SandboxCrashedException: Sandbox has crashed while serving the request
                  	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
                  	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
                  	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1592)
                  	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
                  	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
                  	at java.lang.Thread.run(Thread.java:748)
                  Caused by: com.atlassian.confluence.util.sandbox.SandboxCrashedException: Sandbox has crashed while serving the request
                  	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.tryToThrowSpecificException(SandboxProcess.java:230)
                  	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.execute(SandboxProcess.java:159)
                  	at com.atlassian.confluence.impl.util.sandbox.DefaultSandboxPool.execute(DefaultSandboxPool.java:116)
                  	at com.atlassian.confluence.impl.util.sandbox.ConfluenceSandboxPoolFactory$LazySandbox.execute(ConfluenceSandboxPoolFactory.java:72)
                  	at com.atlassian.confluence.impl.util.sandbox.DefaultSandbox.execute(DefaultSandbox.java:41)
                  	at com.atlassian.confluence.plugins.conversion.impl.sandbox.LocalDocumentConversionSandbox.execute(LocalDocumentConversionSandbox.java:66)
                  	at com.atlassian.confluence.plugins.conversion.impl.sandbox.LocalDocumentConversionSandbox.execute(LocalDocumentConversionSandbox.java:59)
                  	at com.atlassian.confluence.plugins.conversion.impl.sandbox.DelegatingDocumentConversionSandbox.execute(DelegatingDocumentConversionSandbox.java:47)
                  	at com.atlassian.confluence.plugins.conversion.impl.LocalFileSystemConversionResultSupplier.lambda$performConversionInSandbox$1(LocalFileSystemConversionResultSupplier.java:227)
                  	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1590)
                  	... 3 more
                  Caused by: java.io.EOFException
                  	at java.io.DataInputStream.readInt(DataInputStream.java:392)
                  	at com.atlassian.confluence.impl.util.sandbox.SandboxMessage.receiveMessage(SandboxMessage.java:42)
                  	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.receiveMessage(SandboxProcess.java:283)
                  	at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.execute(SandboxProcess.java:156)
                  	... 11 more
                  

                Diagnosis

                Enabling com.atlassian.confluence.impl.util DEBUG shows:

                2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
                2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.internal.e9.void.toArray(Unknown Source)
                2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.internal.mb.try.if(Unknown Source)
                2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.internal.e7.new.do(Unknown Source)
                2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.internal.n4.implements.do(Unknown Source)
                2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.internal.n7.final.do(Unknown Source)
                2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.internal.n7.final.do(Unknown Source)
                2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.internal.n7.final.do(Unknown Source)
                2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.FontsLoader.do(Unknown Source)
                2021-06-11 15:47:35,863 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.aspose.slides.FontsLoader.loadExternalFonts(Unknown Source)
                2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.atlassian.plugins.conversion.AsposeUtils.configureFonts(AsposeUtils.java:117)
                2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.atlassian.plugins.conversion.AsposeAware.<clinit>(AsposeAware.java:6)
                2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.atlassian.plugins.conversion.sandbox.SandboxConversionTask.<clinit>(SandboxConversionTask.java:33)
                2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at java.lang.Class.forName0(Native Method)
                2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at java.lang.Class.forName(Class.java:348)
                2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.atlassian.confluence.impl.util.sandbox.SandboxServer.createTask(SandboxServer.java:81)
                2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.atlassian.confluence.impl.util.sandbox.SandboxServer.run(SandboxServer.java:60)
                2021-06-11 15:47:35,864 INFO [sandbox-logger] [impl.util.sandbox.ConversionSandbox] lambda$static$0 worker0: 	at com.atlassian.confluence.impl.util.sandbox.SandboxServer.main(SandboxServer.java:121)
                2021-06-11 15:47:36,262 WARN [document-conversion-sandbox-launcher-1] [impl.util.sandbox.SandboxProcess] startIfDead Sandbox 0 has died
                
                • Increasing the Sandbox memory to 4GB didn't help - still crashes with out of memory
                  -Dconversion.sandbox.memory.limit.megabytes=4096
                  
                • Increasing the Sandbox memory to 8GB seemed to do the trick!
                  -Dconversion.sandbox.memory.limit.megabytes=8192
                  

                Alternative symptom: View file macro doesn't load:

                Caused by: java.lang.OutOfMemoryError: Java heap space
                        at com.aspose.slides.internal.e9.void.toArray(Unknown Source)
                        at com.aspose.slides.internal.mb.try.if(Unknown Source)
                        at com.aspose.slides.internal.e7.new.do(Unknown Source)
                        at com.aspose.slides.internal.n4.implements.do(Unknown Source)
                        at com.aspose.slides.internal.n7.final.do(Unknown Source)
                        at com.aspose.slides.internal.n7.case.if(Unknown Source)
                        at com.aspose.slides.internal.n7.else.do(Unknown Source)
                        at com.aspose.slides.internal.n7.else.do(Unknown Source)
                        at com.aspose.slides.internal.n7.else.else(Unknown Source)
                        at com.aspose.slides.internal.n7.else.byte(Unknown Source)
                        at com.aspose.slides.internal.n7.case.do(Unknown Source)
                        at com.aspose.slides.o6.do(Unknown Source)
                        at com.aspose.slides.o6.do(Unknown Source)
                        at com.aspose.slides.o6.do(Unknown Source)
                        at com.aspose.slides.ok.do(Unknown Source)
                        at com.aspose.slides.ok.do(Unknown Source)
                

                Workaround

                Try adding these JVM flags and restart Confluence:

                -Ddocument.conversion.sandbox.request.time.limit.secs=300
                -Dconversion.sandbox.memory.limit.megabytes=8192
                -Dconversion.sandbox.java.options="-Dconfluence.document.conversion.slides.convert.timeout=300"
                

                See Configuring System Properties for more details

                • (not recommended) Try removing unused fonts from OS.

                  1. Powerpoint File.pptx
                    33 kB
                  2. samplepptx.pptx
                    404 kB
                  3. screenshot-1.png
                    screenshot-1.png
                    18 kB

                        309dbaf64012 Javan (Inactive)
                        aknight@atlassian.com Alex K
                        Votes:
                        8 Vote for this issue
                        Watchers:
                        37 Start watching this issue

                          Created:
                          Updated:
                          Resolved:

                            309dbaf64012 Javan (Inactive)
                            aknight@atlassian.com Alex K
                            Affected customers:
                            8 This affects my team
                            Watchers:
                            37 Start watching this issue

                              Created:
                              Updated:
                              Resolved: