Caused by: com.atlassian.confluence.importexport.ImportExportException: Failed to upload application/pdf file to filestore. Failure: Failure{cause=org.apache.http.conn.ConnectionPoolTimeoutException: Timeout waiting for connection from pool, reason=TRANSPORT_ERROR, message='null', httpStatusCode=null}

	 stack:	 com.atlassian.confluence.importexport.ImportExportException: com.atlassian.confluence.importexport.ImportExportException: Failed to upload application/pdf file to filestore. Failure: Failure{cause=org.apache.http.conn.ConnectionPoolTimeoutException: Timeout waiting for connection from pool, reason=TRANSPORT_ERROR, message='null', httpStatusCode=null}
	at com.atlassian.confluence.importexport.impl.FilestoreTemporaryFileUploaderImpl.upload(FilestoreTemporaryFileUploaderImpl.java:67)
	at com.atlassian.confluence.extra.flyingpdf.FlyingSaucerPdfExporterService.uploadFileToFilestore(FlyingSaucerPdfExporterService.java:134)
	at com.atlassian.confluence.extra.flyingpdf.FlyingSaucerPdfExporterService.createPdfForPage(FlyingSaucerPdfExporterService.java:122)
	at com.atlassian.confluence.extra.flyingpdf.PdfExportTaskRunnerImpl.createPdfFile(PdfExportTaskRunnerImpl.java:196)
	at com.atlassian.confluence.extra.flyingpdf.PdfExportTaskRunnerImpl.lambda$executeExportAsPdfTask$1(PdfExportTaskRunnerImpl.java:167)
	at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
	at com.atlassian.confluence.extra.flyingpdf.PdfExportTaskRunnerImpl.executeExportAsPdfTask(PdfExportTaskRunnerImpl.java:162)
	at com.atlassian.confluence.extra.flyingpdf.PdfExportTaskRunnerImpl.runTask(PdfExportTaskRunnerImpl.java:133)
	at com.atlassian.progress.amq.TaskProcessor.accept(TaskProcessor.java:63)
	at com.atlassian.progress.amq.TaskProcessor.accept(TaskProcessor.java:23)
	at com.atlassian.progress.amq.ConcurrencyControlTaskProcessor.accept(ConcurrencyControlTaskProcessor.java:68)
	at com.atlassian.progress.amq.ConcurrencyControlTaskProcessor.accept(ConcurrencyControlTaskProcessor.java:19)
	at com.atlassian.progress.amq.ProgressAwareMessageRunner.processMessage(ProgressAwareMessageRunner.java:55)
	at com.atlassian.confluence.impl.messagequeue.VCacheMessageRunner.lambda$processMessage$0(VCacheMessageRunner.java:21)
	at com.atlassian.confluence.vcache.VCacheRequestContextOperations.lambda$doInRequestContext$0(VCacheRequestContextOperations.java:49)
	at com.atlassian.confluence.impl.vcache.VCacheRequestContextManager.doInRequestContext(VCacheRequestContextManager.java:84)
	at com.atlassian.confluence.impl.vcache.VCacheRequestContextManager.doInRequestContext(VCacheRequestContextManager.java:74)
	at com.atlassian.confluence.vcache.VCacheRequestContextOperations.doInRequestContext(VCacheRequestContextOperations.java:48)
	at com.atlassian.confluence.impl.messagequeue.VCacheMessageRunner.processMessage(VCacheMessageRunner.java:20)
	at com.atlassian.confluence.util.zipkin.impl.ZipkinMessageRunner.processMessage(ZipkinMessageRunner.java:31)
	at com.atlassian.messagequeue.internal.core.NestedMessageConsumer.consume(NestedMessageConsumer.java:135)
	at com.atlassian.messagequeue.internal.sqs.SQSMessageConsumer.processReceiveMessageResult(SQSMessageConsumer.java:171)
	at com.atlassian.messagequeue.internal.sqs.SQSMessageConsumer.run(SQSMessageConsumer.java:112)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: com.atlassian.confluence.importexport.ImportExportException: Failed to upload application/pdf file to filestore. Failure: Failure{cause=org.apache.http.conn.ConnectionPoolTimeoutException: Timeout waiting for connection from pool, reason=TRANSPORT_ERROR, message='null', httpStatusCode=null}
	at com.atlassian.confluence.importexport.impl.FilestoreTemporaryFileUploaderImpl.upload(FilestoreTemporaryFileUploaderImpl.java:63)
	... 25 more	

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