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Hadoop QA commented on HDFS-7915: --------------------------------- {color:red}-1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12704525/HDFS-7915.005.patch against trunk revision 6fdef76. {color:red}-1 patch{color}. Trunk compilation may be broken. Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/9881//console This message is automatically generated. > The DataNode can sometimes allocate a ShortCircuitShm slot and fail to tell > the DFSClient about it because of a network error > ----------------------------------------------------------------------------------------------------------------------------- > > Key: HDFS-7915 > URL: https://issues.apache.org/jira/browse/HDFS-7915 > Project: Hadoop HDFS > Issue Type: Bug > Affects Versions: 2.7.0 > Reporter: Colin Patrick McCabe > Assignee: Colin Patrick McCabe > Attachments: HDFS-7915.001.patch, HDFS-7915.002.patch, > HDFS-7915.004.patch, HDFS-7915.005.patch > > > The DataNode can sometimes allocate a ShortCircuitShm slot and fail to tell > the DFSClient about it because of a network error. In > {{DataXceiver#requestShortCircuitFds}}, the DataNode can succeed at the first > part (mark the slot as used) and fail at the second part (tell the DFSClient > what it did). The "try" block for unregistering the slot only covers a > failure in the first part, not the second part. In this way, a divergence can > form between the views of which slots are allocated on DFSClient and on > server. -- This message was sent by Atlassian JIRA (v6.3.4#6332)