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Posted to issues@ozone.apache.org by "Bharat Viswanadham (Jira)" <ji...@apache.org> on 2021/08/06 07:27:00 UTC
[jira] [Updated] (HDDS-5547) Generate raftgroupId should not depend
on service id
[ https://issues.apache.org/jira/browse/HDDS-5547?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Bharat Viswanadham updated HDDS-5547:
-------------------------------------
Description:
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$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
{code}
One possible solution is
If a ratis group dir already exists, use that as it is an existing cluster we cannot change. For new clusters might be we can use clusterID which does not change for a ozone cluster.
This is just one idea, we can discuss any other approaches to solve this issue and fix this.
As right now, in OM we don't allow change of om service id
was:
In OM HA, raftGroupID is generated from service ID.
So, if there is a change in OM Service ID OM startup fails with below error
{code:java}
2021-08-05 12:20:03,043 ERROR org.apache.hadoop.ozone.om.OzoneManagerStarter: OM start failed with exception
java.io.IOException: java.lang.IllegalStateException: ILLEGAL TRANSITION: In OzoneManagerStateMachine:om1:group-8A65FD498CB6, RUNNING -> STARTING
at org.apache.ratis.util.IOUtils.asIOException(IOUtils.java:54)
at org.apache.ratis.util.IOUtils.toIOException(IOUtils.java:61)
at org.apache.ratis.util.IOUtils.getFromFuture(IOUtils.java:71)
at org.apache.ratis.server.impl.RaftServerProxy.getImpls(RaftServerProxy.java:354)
at org.apache.ratis.server.impl.RaftServerProxy.start(RaftServerProxy.java:371)
at org.apache.hadoop.ozone.om.ratis.OzoneManagerRatisServer.start(OzoneManagerRatisServer.java:390)
at org.apache.hadoop.ozone.om.OzoneManager.start(OzoneManager.java:1109)
at org.apache.hadoop.ozone.om.OzoneManagerStarter$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$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
{code}
The reason is now a new ratis group directory is created and StateMachine instance is shared between them. The error is confusing to end users as it is not clear that it is due to change in OM serviceId this caused failure.
This Jira is to add some safeguard code and give clear message to know om startup failure. I will raise another jira to not to use om service id in ratis group ID.
> Generate raftgroupId should not depend on service id
> ----------------------------------------------------
>
> Key: HDDS-5547
> URL: https://issues.apache.org/jira/browse/HDDS-5547
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Bharat Viswanadham
> Assignee: Bharat Viswanadham
> Priority: Major
>
> In OM HA, raftGroupID is generated from service ID.
> So, if there is a change in OM Service ID OM startup fails with below error
> {code:java}
> 2021-08-05 12:20:03,043 ERROR org.apache.hadoop.ozone.om.OzoneManagerStarter: OM start failed with exception
> java.io.IOException: java.lang.IllegalStateException: ILLEGAL TRANSITION: In OzoneManagerStateMachine:om1:group-8A65FD498CB6, RUNNING -> STARTING
> at org.apache.ratis.util.IOUtils.asIOException(IOUtils.java:54)
> at org.apache.ratis.util.IOUtils.toIOException(IOUtils.java:61)
> at org.apache.ratis.util.IOUtils.getFromFuture(IOUtils.java:71)
> at org.apache.ratis.server.impl.RaftServerProxy.getImpls(RaftServerProxy.java:354)
> at org.apache.ratis.server.impl.RaftServerProxy.start(RaftServerProxy.java:371)
> at org.apache.hadoop.ozone.om.ratis.OzoneManagerRatisServer.start(OzoneManagerRatisServer.java:390)
> at org.apache.hadoop.ozone.om.OzoneManager.start(OzoneManager.java:1109)
> at org.apache.hadoop.ozone.om.OzoneManagerStarter$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}
> One possible solution is
> If a ratis group dir already exists, use that as it is an existing cluster we cannot change. For new clusters might be we can use clusterID which does not change for a ozone cluster.
> This is just one idea, we can discuss any other approaches to solve this issue and fix this.
> As right now, in OM we don't allow change of om service id
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