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https://issues.apache.org/jira/browse/HDDS-7304?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephen O'Donnell resolved HDDS-7304.
-------------------------------------
Fix Version/s: 1.3.0
Resolution: Fixed
> EC: EC Decode can fail when byteBuffer from elastic pool is larger than
> chunksize
> ---------------------------------------------------------------------------------
>
> Key: HDDS-7304
> URL: https://issues.apache.org/jira/browse/HDDS-7304
> Project: Apache Ozone
> Issue Type: Sub-task
> Components: EC Client
> Reporter: Stephen O'Donnell
> Assignee: Stephen O'Donnell
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.3.0
>
>
> The EC client establishes an ElasticByteBufferPool, so that byte buffers can
> be assigned / freed and reused without allocating and freeing memory over and
> over. The buffer returned by the elastic buffer can be larger than the size
> requested, and if that is the case we can get an error on EC decode, such as:
> {code}
> java.lang.IllegalArgumentException: Invalid buffer [3], not of length 1048576
> at
> org.apache.ozone.erasurecode.rawcoder.ByteBufferDecodingState.checkInputBuffers(ByteBufferDecodingState.java:106)
> at
> org.apache.ozone.erasurecode.rawcoder.ByteBufferDecodingState.<init>(ByteBufferDecodingState.java:44)
> at
> org.apache.ozone.erasurecode.rawcoder.RawErasureDecoder.decode(RawErasureDecoder.java:84)
> at
> org.apache.hadoop.ozone.client.io.ECBlockReconstructedStripeInputStream.decodeStripe(ECBlockReconstructedStripeInputStream.java:649)
> at
> org.apache.hadoop.ozone.client.io.ECBlockReconstructedStripeInputStream.read(ECBlockReconstructedStripeInputStream.java:388)
> at
> org.apache.hadoop.ozone.client.io.TestECBlockReconstructedStripeInputStream.testErrorReadingBlockContinuesReading(TestECBlockReconstructedStripeInputStream.java:622)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:725)
> at
> org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
> at
> org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
> ...
> {code}
> The solution is to set the limit on the buffer to the appropriate size before
> attempting to use it.
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