[RESTEASY-3670] Prevent off-heap OOME with chunked entity file writes#4735
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Introduces chunked writing for entity output streams to prevent large DirectByteBuffer allocations when writing large POST request entities to temporary files. The default buffer size of 8KB prevents the NIO layer from allocating large thread-local buffers that can exhaust off-heap memory with small MaxDirectMemorySize settings. https://issues.redhat.com/browse/RESTEASY-3670 Signed-off-by: James R. Perkins <jperkins@ibm.com>
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Jira issue: SWATCH-4569 ## Description The issue is happening only when trying to upload larger files than 1 MB and causes the consumer to stop working (consuming more messages from the topic). This is caused by the changes in resteasy/resteasy#4735 which introduced ClientEntityOutputStream$PathHttpEntity which has a visibility class bug when trying to instantiate EntityInputStream. I reported the issue by RESTEASY-3691. These changes reproduce the issue and downgrade the resteasy version to 7.0.0. ## Testing Reproduced via unit tests. To reproduce the test manually, you would need to request a report larger than 1 MB.
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Introduces chunked writing for entity output streams to prevent large DirectByteBuffer allocations when writing large POST request entities to temporary files. The default buffer size of 8KB prevents the NIO layer from allocating large thread-local buffers that can exhaust off-heap memory with small MaxDirectMemorySize settings.
https://issues.redhat.com/browse/RESTEASY-3670