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Posted to hdfs-issues@hadoop.apache.org by "Eric Badger (JIRA)" <ji...@apache.org> on 2016/12/05 22:09:58 UTC
[jira] [Updated] (HDFS-11207) Unnecessary incompatible change of
NNHAStatusHeartbeat.state in DatanodeProtocolProtos
[ https://issues.apache.org/jira/browse/HDFS-11207?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Eric Badger updated HDFS-11207:
-------------------------------
Status: Patch Available (was: Open)
> Unnecessary incompatible change of NNHAStatusHeartbeat.state in DatanodeProtocolProtos
> --------------------------------------------------------------------------------------
>
> Key: HDFS-11207
> URL: https://issues.apache.org/jira/browse/HDFS-11207
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Eric Badger
> Assignee: Eric Badger
> Attachments: HDFS-11207.001.patch
>
>
> HDFS-5079 changed the meaning of state in {{NNHAStatusHeartbeat}} when it added in the {{INITIALIZING}} state via {{HAServiceStateProto}}.
> Before change:
> {noformat}
> enum State {
> ACTIVE = 0;
> STANDBY = 1;
> }
> {noformat}
> After change:
> {noformat}
> enum HAServiceStateProto {
> INITIALIZING = 0;
> ACTIVE = 1;
> STANDBY = 2;
> }
> {noformat}
> So the new {{INITIALIZING}} state will be interpreted as {{ACTIVE}}, new {{ACTIVE}} interpreted as {{STANDBY}} and new {{STANDBY}} interpreted as unknown. Any rolling upgrade to 3.0.0 will break because the datanodes that haven't been updated will misinterpret the NN state.
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