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Hadoop QA commented on HDFS-6289: --------------------------------- {color:red}-1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12642380/HDFS-6289.patch against trunk revision . {color:green}+1 @author{color}. The patch does not contain any @author tags. {color:green}+1 tests included{color}. The patch appears to include 2 new or modified test files. {color:green}+1 javac{color}. The applied patch does not increase the total number of javac compiler warnings. {color:green}+1 javadoc{color}. There were no new javadoc warning messages. {color:green}+1 eclipse:eclipse{color}. The patch built with eclipse:eclipse. {color:green}+1 findbugs{color}. The patch does not introduce any new Findbugs (version 1.3.9) warnings. {color:green}+1 release audit{color}. The applied patch does not increase the total number of release audit warnings. {color:red}-1 core tests{color}. The patch failed these unit tests in hadoop-hdfs-project/hadoop-hdfs: org.apache.hadoop.hdfs.server.namenode.ha.TestDNFencingWithReplication {color:green}+1 contrib tests{color}. The patch passed contrib unit tests. Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/6759//testReport/ Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/6759//console This message is automatically generated. > HA failover can fail if there are pending DN messages for DNs which no longer > exist > ----------------------------------------------------------------------------------- > > Key: HDFS-6289 > URL: https://issues.apache.org/jira/browse/HDFS-6289 > Project: Hadoop HDFS > Issue Type: Bug > Components: ha > Affects Versions: 2.4.0 > Reporter: Aaron T. Myers > Assignee: Aaron T. Myers > Priority: Critical > Attachments: HDFS-6289.patch, HDFS-6289.patch > > > In an HA setup, the standby NN may receive messages from DNs for blocks which > the standby NN is not yet aware of. It queues up these messages and replays > them when it next reads from the edit log or fails over. On a failover, all > of these pending DN messages must be processed successfully in order for the > failover to succeed. If one of these pending DN messages refers to a DN > storageId that no longer exists (because the DN with that transfer address > has been reformatted and has re-registered with the same transfer address) > then on transition to active the NN will not be able to process this DN > message and will suicide with an error like the following: > {noformat} > 2014-04-25 14:23:17,922 FATAL namenode.NameNode > (NameNode.java:doImmediateShutdown(1525)) - Error encountered requiring NN > shutdown. Shutting down immediately. > java.io.IOException: Cannot mark > blk_1073741825_900(stored=blk_1073741825_1001) as corrupt because datanode > 127.0.0.1:33324 does not exist > {noformat} -- This message was sent by Atlassian JIRA (v6.2#6252)