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https://issues.apache.org/jira/browse/HADOOP-14906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16179034#comment-16179034
 ] 

Steve Loughran commented on HADOOP-14906:
-----------------------------------------

Stack. The initial exception, "null", is a sign that the Azure SDK isn't 
including exception text when it wraps inner exceptions; the nested exception 
is reporting a mismatch between the MD5 sent up in a PUT/POST and that received 
at the far end.

These tests are being run in a different location/network from usual, if that's 
likely to interfere: over HTTPS it shouldn't. Surfaces in branch-2 and trunk.

{code}
testReadOOBWrites(org.apache.hadoop.fs.azure.ITestAzureConcurrentOutOfBandIo)  
Time elapsed: 8.923 sec  <<< ERROR!
java.io.IOException: null
        at 
com.microsoft.azure.storage.core.Utility.initIOException(Utility.java:770)
        at 
com.microsoft.azure.storage.blob.BlobOutputStreamInternal.writeBlock(BlobOutputStreamInternal.java:443)
        at 
com.microsoft.azure.storage.blob.BlobOutputStreamInternal.access$000(BlobOutputStreamInternal.java:52)
        at 
com.microsoft.azure.storage.blob.BlobOutputStreamInternal$1.call(BlobOutputStreamInternal.java:387)
        at 
com.microsoft.azure.storage.blob.BlobOutputStreamInternal$1.call(BlobOutputStreamInternal.java:384)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: com.microsoft.azure.storage.StorageException: The MD5 value 
specified in the request did not match with the MD5 value calculated by the 
server.
        at 
com.microsoft.azure.storage.StorageException.translateException(StorageException.java:89)
        at 
com.microsoft.azure.storage.core.StorageRequest.materializeException(StorageRequest.java:315)
        at 
com.microsoft.azure.storage.core.ExecutionEngine.executeWithRetry(ExecutionEngine.java:175)
        at 
com.microsoft.azure.storage.blob.CloudBlockBlob.uploadBlockInternal(CloudBlockBlob.java:1078)
        at 
com.microsoft.azure.storage.blob.CloudBlockBlob.uploadBlock(CloudBlockBlob.java:1050)
        at 
com.microsoft.azure.storage.blob.BlobOutputStreamInternal.writeBlock(BlobOutputStreamInternal.java:437)
        at 
com.microsoft.azure.storage.blob.BlobOutputStreamInternal.access$000(BlobOutputStreamInternal.java:52)
        at 
com.microsoft.azure.storage.blob.BlobOutputStreamInternal$1.call(BlobOutputStreamInternal.java:387)
        at 
com.microsoft.azure.storage.blob.BlobOutputStreamInternal$1.call(BlobOutputStreamInternal.java:384)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
{code}



> ITestAzureConcurrentOutOfBandIo failing with checksum errors on write
> ---------------------------------------------------------------------
>
>                 Key: HADOOP-14906
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14906
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/azure
>    Affects Versions: 2.9.0, 3.1.0
>         Environment: UK BT ASDL connection, 1.8.0_121-b13, azure storage 
> ireland
>            Reporter: Steve Loughran
>
> {{ITestAzureConcurrentOutOfBandIo}} is consistently raising an IOE with the 
> text "The MD5 value specified in the request did not match with the MD5 value 
> calculated by the server"



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