z-bb opened a new pull request, #4997:
URL: https://github.com/apache/ozone/pull/4997
## What changes were proposed in this pull request?
During the upgrade process, the datanode has an error exception message.
datanode log:
```
java.util.concurrent.ExecutionException:
java.util.concurrent.ExecutionException: java.lang.IllegalStateException:
DataNode has higher Software Layout Version than SCM.
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:192)
at
org.apache.hadoop.ozone.container.common.states.datanode.RunningDatanodeState.computeNextContainerState(RunningDatanodeState.java:199)
at
org.apache.hadoop.ozone.container.common.states.datanode.RunningDatanodeState.await(RunningDatanodeState.java:239)
at
org.apache.hadoop.ozone.container.common.states.datanode.RunningDatanodeState.await(RunningDatanodeState.java:50)
at
org.apache.hadoop.ozone.container.common.statemachine.StateContext.execute(StateContext.java:666)
at
org.apache.hadoop.ozone.container.common.statemachine.DatanodeStateMachine.startStateMachineThread(DatanodeStateMachine.java:334)
at
org.apache.hadoop.ozone.container.common.statemachine.DatanodeStateMachine.lambda$startDaemon$0(DatanodeStateMachine.java:532)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.util.concurrent.ExecutionException:
java.lang.IllegalStateException: DataNode has higher Software Layout Version
than SCM.
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:206)
at
org.apache.hadoop.ozone.container.common.states.datanode.RunningDatanodeState.lambda$execute$0(RunningDatanodeState.java:157)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
... 1 more
Caused by: java.lang.IllegalStateException: DataNode has higher Software
Layout Version than SCM.
at
com.google.common.base.Preconditions.checkState(Preconditions.java:512)
at
org.apache.hadoop.ozone.container.common.states.endpoint.RegisterEndpointTask.call(RegisterEndpointTask.java:165)
at
org.apache.hadoop.ozone.container.common.states.endpoint.RegisterEndpointTask.call(RegisterEndpointTask.java:52)
... 4 more
```
Through positioning, it is found that when the datanode calls the register
method to the recon, because the recon has not been updated to the new version,
the layout of the recon is inconsistent with the layout of the datanode.
I think this exception message is misleading DataNode has higher Software
Layout Version than SCM.
## What is the link to the Apache JIRA
https://issues.apache.org/jira/browse/HDDS-8948
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