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https://issues.apache.org/jira/browse/HDDS-5546?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bharat Viswanadham resolved HDDS-5546.
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Fix Version/s: 1.2.0
Resolution: Fixed
> OM Service ID change causes OM startup failure
> ----------------------------------------------
>
> Key: HDDS-5546
> URL: https://issues.apache.org/jira/browse/HDDS-5546
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Bharat Viswanadham
> Assignee: Bharat Viswanadham
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.2.0
>
>
> In OM HA, raftGroupID is generated from service ID.
> So, if there is a change in OM Service ID OM startup fails with below error
> {code:java}
> 2021-08-05 12:20:03,043 ERROR org.apache.hadoop.ozone.om.OzoneManagerStarter:
> OM start failed with exception
> java.io.IOException: java.lang.IllegalStateException: ILLEGAL TRANSITION: In
> OzoneManagerStateMachine:om1:group-8A65FD498CB6, RUNNING -> STARTING
> at org.apache.ratis.util.IOUtils.asIOException(IOUtils.java:54)
> at org.apache.ratis.util.IOUtils.toIOException(IOUtils.java:61)
> at org.apache.ratis.util.IOUtils.getFromFuture(IOUtils.java:71)
> at
> org.apache.ratis.server.impl.RaftServerProxy.getImpls(RaftServerProxy.java:354)
> at
> org.apache.ratis.server.impl.RaftServerProxy.start(RaftServerProxy.java:371)
> at
> org.apache.hadoop.ozone.om.ratis.OzoneManagerRatisServer.start(OzoneManagerRatisServer.java:390)
> at
> org.apache.hadoop.ozone.om.OzoneManager.start(OzoneManager.java:1109)
> at
> org.apache.hadoop.ozone.om.OzoneManagerStarter$OMStarterHelper.start(OzoneManagerStarter.java:126)
> at
> org.apache.hadoop.ozone.om.OzoneManagerStarter.startOm(OzoneManagerStarter.java:79)
> at
> org.apache.hadoop.ozone.om.OzoneManagerStarter.call(OzoneManagerStarter.java:67)
> at
> org.apache.hadoop.ozone.om.OzoneManagerStarter.call(OzoneManagerStarter.java:38)
> at picocli.CommandLine.executeUserObject(CommandLine.java:1933)
> at picocli.CommandLine.access$1100(CommandLine.java:145)
> at
> picocli.CommandLine$RunLast.executeUserObjectOfLastSubcommandWithSameParent(CommandLine.java:2332)
> at picocli.CommandLine$RunLast.handle(CommandLine.java:2326)
> at picocli.CommandLine$RunLast.handle(CommandLine.java:2291)
> at
> picocli.CommandLine$AbstractParseResultHandler.handleParseResult(CommandLine.java:2152)
> at picocli.CommandLine.parseWithHandlers(CommandLine.java:2530)
> at picocli.CommandLine.parseWithHandler(CommandLine.java:2465)
> at org.apache.hadoop.hdds.cli.GenericCli.execute(GenericCli.java:96)
> at org.apache.hadoop.hdds.cli.GenericCli.run(GenericCli.java:87)
> at
> org.apache.hadoop.ozone.om.OzoneManagerStarter.main(OzoneManagerStarter.java:51)
> Caused by: java.lang.IllegalStateException: ILLEGAL TRANSITION: In
> OzoneManagerStateMachine:om1:group-8A65FD498CB6, RUNNING -> STARTING
> at
> org.apache.ratis.util.Preconditions.assertTrue(Preconditions.java:60)
> at org.apache.ratis.util.LifeCycle$State.validate(LifeCycle.java:121)
> at org.apache.ratis.util.LifeCycle.transition(LifeCycle.java:164)
> at
> org.apache.ratis.util.LifeCycle.startAndTransition(LifeCycle.java:268)
> at
> org.apache.hadoop.ozone.om.ratis.OzoneManagerStateMachine.initialize(OzoneManagerStateMachine.java:127)
> at
> org.apache.ratis.server.impl.ServerState.<init>(ServerState.java:120)
> at
> org.apache.ratis.server.impl.RaftServerImpl.<init>(RaftServerImpl.java:193)
> at
> org.apache.ratis.server.impl.RaftServerProxy.lambda$newRaftServerImpl$4(RaftServerProxy.java:266)
> at
> java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1604)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> {code}
> The reason is now a new ratis group directory is created and StateMachine
> instance is shared between them. The error is confusing to end users as it is
> not clear that it is due to change in OM serviceId this caused failure.
> This Jira is to add some safeguard code and give clear message to know om
> startup failure. I will raise another jira to not to use om service id in
> ratis group ID.
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