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Posted to hdfs-issues@hadoop.apache.org by "Ayush Saxena (Jira)" <ji...@apache.org> on 2021/06/02 19:29:00 UTC
[jira] [Updated] (HDFS-16038) DataNode Unrecognized Observer Node
when cluster add an observer node
[ https://issues.apache.org/jira/browse/HDFS-16038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ayush Saxena updated HDFS-16038:
--------------------------------
Issue Type: Bug (was: New Feature)
> DataNode Unrecognized Observer Node when cluster add an observer node
> ---------------------------------------------------------------------
>
> Key: HDFS-16038
> URL: https://issues.apache.org/jira/browse/HDFS-16038
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: lei w
> Priority: Critical
>
> When an Observer node is added to the cluster, the DataNode will not be able to recognize the HAServiceState.observer, This is because we did not upgrade the DataNode. Generally, it will take a long time for a big cluster to upgrade the DataNode . So should we add a switch to replace the Observer state with the Standby state when DataNode can not recognize the HAServiceState.observer state?
> The following are some error messages of DataNodeļ¼
> {code:java}
> 11:14:31,812 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: IOException in offerService
> com.google.protobuf.InvalidProtocolBufferException: Message missing required fields: haStatus.state
> at com.google.protobuf.UninitializedMessageException.asInvalidProtocolBufferException(UninitializedMessageException.java:81)
> at com.google.protobuf.AbstractParser.checkMessageInitialized(AbstractParser.java:71)
> {code}
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