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Mingliang Liu commented on HDFS-11094: -------------------------------------- Thanks for bringing this up. If we agree to revert [HDFS-5079] in [HDFS-11207], we can firstly revert this to avoid breaking the build in {{trunk}}. We need more input who evolved in [HDFS-5079] before reverting it. For {{branch-2}} I won't commit the current patch. > Send back HAState along with NamespaceInfo during a versionRequest as an > optional parameter > ------------------------------------------------------------------------------------------- > > Key: HDFS-11094 > URL: https://issues.apache.org/jira/browse/HDFS-11094 > Project: Hadoop HDFS > Issue Type: Bug > Components: datanode > Reporter: Eric Badger > Assignee: Eric Badger > Fix For: 3.0.0-alpha2 > > Attachments: HDFS-11094.001.patch, HDFS-11094.002.patch, > HDFS-11094.003.patch, HDFS-11094.004.patch, HDFS-11094.005.patch, > HDFS-11094.006.patch, HDFS-11094.007.patch, HDFS-11094.008.patch, > HDFS-11094.009-b2.patch, HDFS-11094.009.patch > > > The datanode should know which NN is active when it is connecting/registering > to the NN. Currently, it only figures this out during its first (and > subsequent) heartbeat(s) and so there is a period of time where the datanode > is alive and registered, but can't actually do anything because it doesn't > know which NN is active. A byproduct of this is that the MiniDFSCluster will > become active before it knows what NN is active, which can lead to NPEs when > calling getActiveNN(). -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org