Loading...

Type: Bug
Resolution: Fixed
Priority: High
Fix Version/s: 9.4.1, 9.2.4, 8.5.22
Affects Version/s: 8.2.1, 7.19.12, 8.6.1
Component/s: Page - Export / Import
Labels:

Support reference count:
32
Symptom Severity:
Severity 3 - Minor
UIS:
60

An unordered list created with excessive <ul><li> tags causes PDF generation to fail for the page

Sandbox crashes if sandbox process generation is enabled
OOM issue observed in the logs
CPU utilization> 100

Recreation Steps

Create a new page
Create an unordered list by pressing Tab multiple Times (storage format attached for sample page)
Create a PDF export
Issue can be reproduced irrespective of whether sandbox generation is enabled or disabled

Storage Format

<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li style="list-style-type: none;">
<ul>
<li>Test Page</li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul>

Expected Results

PDF export successful without issues

Actual Results

PDF generation fails with below error

CPU spikes

Error in the logs

 -- url: /confluence/spaces/flyingpdf/pdfpageexport.action | userName: admin | referer: https://linux-56273.prod.atl-cd.net/confluence/display/PD/Test | traceId: 5b093dbebd82045c
2023-11-05 09:47:34,167 ERROR [http-nio-8090-exec-3 url: /confluence/spaces/flyingpdf/pdfpageexport.action; user: admin] [apache.struts2.dispatcher.DefaultDispatcherErrorHandler] sendErrorResponse Exception occurred during processing request: co
m.atlassian.confluence.importexport.ImportExportException: We couldn't complete your export. There was an error converting the page \"Test\". <a href=\"https://docs.atlassian.com/confluence/docs-86/PDF+export+in+Confluence+Data+Center\">Learn mo
re</a>
 -- url: /confluence/spaces/flyingpdf/pdfpageexport.action | userName: admin | referer: https://linux-56273.prod.atl-cd.net/confluence/display/PD/Test | traceId: 5b093dbebd82045c
java.lang.RuntimeException: com.atlassian.confluence.importexport.ImportExportException: We couldn't complete your export. There was an error converting the page "Test". <a href="https://docs.atlassian.com/confluence/docs-86/PDF+export+in+Confluence+Data+Center">Learn more</a>
        at com.atlassian.confluence.extra.flyingpdf.impl.ExportPageAsPdfAction.doExecute(ExportPageAsPdfAction.java:62)
        at com.atlassian.confluence.extra.flyingpdf.impl.PdfExportSemaphore.run(PdfExportSemaphore.java:28)
        at com.atlassian.confluence.extra.flyingpdf.impl.ExportPageAsPdfAction.execute(ExportPageAsPdfAction.java:34)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at ognl.OgnlRuntime.invokeMethodInsideSandbox(OgnlRuntime.java:1245)
        at ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:1230)
        at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1958)
        at ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:68)
        at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethodWithDebugInfo(XWorkMethodAccessor.java:98)
        at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethod(XWorkMethodAccessor.java:90)
        at ognl.OgnlRuntime.callMethod(OgnlRuntime.java:2034)
        at ognl.ASTMethod.getValueBody(ASTMethod.java:97)
        at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)
        at ognl.SimpleNode.getValue(SimpleNode.java:258)
        at ognl.Ognl.getValue(Ognl.java:586)
        at com.opensymphony.xwork2.ognl.OgnlUtil.ognlGet(OgnlUtil.java:602)
        at com.opensymphony.xwork2.ognl.OgnlUtil.callMethod(OgnlUtil.java:578)
        at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:434)
        at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:307)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:259)
        at com.atlassian.xwork.interceptors.XWorkProfilingInterceptor.intercept(XWorkProfilingInterceptor.java:16)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:256)
        at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:179)
        at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:99)
        at com.atlassian.confluence.core.ConfluenceWorkflowInterceptor.intercept(ConfluenceWorkflowInterceptor.java:25)
        at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:299)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:253)
        at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:263)
        at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:99)
        at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:299)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:253)
        at com.atlassian.confluence.security.interceptors.CaptchaInterceptor.intercept(CaptchaInterceptor.java:44)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:256)
        at com.atlassian.xwork.interceptors.XWorkProfilingInterceptor.intercept(XWorkProfilingInterceptor.java:16)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:256)
        at com.atlassian.xwork.interceptors.XsrfTokenInterceptor.intercept(XsrfTokenInterceptor.java:117)
        at com.atlassian.confluence.xwork.ConfluenceXsrfTokenInterceptor.intercept(ConfluenceXsrfTokenInterceptor.java:30)
.
.
.
Caused by: com.atlassian.confluence.importexport.ImportExportException: We couldn't complete your export. There was an error converting the page "Test". <a href="https://docs.atlassian.com/confluence/docs-86/PDF+export+in+Confluence+Data+Center"
>Learn more</a>
        at com.atlassian.confluence.extra.flyingpdf.sandbox.SandboxXmlToPdfConverter.convertXhtmlToPdf(SandboxXmlToPdfConverter.java:95)
        at com.atlassian.confluence.extra.flyingpdf.sandbox.SandboxPdfExporterService.renderPdf(SandboxPdfExporterService.java:354)
        at com.atlassian.confluence.extra.flyingpdf.sandbox.SandboxPdfExporterService.createPdf(SandboxPdfExporterService.java:340)
        at com.atlassian.confluence.extra.flyingpdf.sandbox.SandboxPdfExporterService.createPdfForPage(SandboxPdfExporterService.java:230)
        at com.atlassian.confluence.extra.flyingpdf.impl.DelegatingPdfExporterService.createPdfForPage(DelegatingPdfExporterService.java:54)
        at com.atlassian.confluence.extra.flyingpdf.impl.BigBrotherPdfExporterService.createPdfForPage(BigBrotherPdfExporterService.java:122)
        at com.atlassian.confluence.extra.flyingpdf.impl.ExportPageAsPdfAction.doExecute(ExportPageAsPdfAction.java:41)
        ... 459 more
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:174)
        at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.execute(SandboxProcess.java:139)
        at com.atlassian.confluence.impl.util.sandbox.SandboxLocalProcessPool.execute(SandboxLocalProcessPool.java:107)
        at com.atlassian.confluence.impl.util.sandbox.ConfluenceSandboxPoolFactory$LazySandbox.execute(ConfluenceSandboxPoolFactory.java:70)
        at com.atlassian.confluence.impl.util.sandbox.DefaultSandbox.execute(DefaultSandbox.java:36)
        at com.atlassian.confluence.extra.flyingpdf.sandbox.PdfExportSandbox.execute(PdfExportSandbox.java:49)
        at com.atlassian.confluence.extra.flyingpdf.sandbox.SandboxXmlToPdfConverter.convertXhtmlToPdf(SandboxXmlToPdfConverter.java:83)
        ... 465 more
Caused by: java.io.EOFException
        at java.base/java.io.DataInputStream.readInt(DataInputStream.java:397)
        at com.atlassian.confluence.impl.util.sandbox.SandboxMessage.receiveMessage(SandboxMessage.java:43)
        at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.receiveMessage(SandboxProcess.java:227)
        at com.atlassian.confluence.impl.util.sandbox.SandboxProcess.execute(SandboxProcess.java:136)
        ... 470 more

Workaround

Install Confluence Source Code Editor
- https://marketplace.atlassian.com/plugins/com.atlassian.confluence.plugins.editor.confluence-source-editor/server/overview
Edit the page, then click the Source Editor icon to edit the page source
Search for the stack of <ul><li></ui></li> tags
Once identified, remove all nested <ul><li></ui></li> tags
Save Page
Generate PDF

- - Sort By Name
  - Sort By Date
  - Ascending
  - Descending
  - Thumbnails
  - List

image-2023-11-05-15-14-31-160.png
365 kB
05/Nov/2023 9:44 AM
image-2023-11-05-15-18-07-054.png
121 kB
05/Nov/2023 9:48 AM
image-2023-11-05-15-23-35-302.png
109 kB
05/Nov/2023 9:53 AM

mentioned in: Page Loading...; Page Loading...; Page Loading...; Page Loading...; Page Loading...; Page Loading...; Page Loading...; Page Loading...; Page Loading...; Page Loading...

(5 mentioned in)

Details

Description

Recreation Steps

Storage Format

Expected Results

Actual Results

PDF generation fails with below error

CPU spikes

Error in the logs

Workaround

Attachments

Attachments

Issue Links

Activity

People

Dates