Uma Maheswara Rao G created HDDS-6830:
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Summary: EC: SCMContainerPlacementRackScatter#chooseDatanodes may
choose less nodes than required in unknown cases.
Key: HDDS-6830
URL: https://issues.apache.org/jira/browse/HDDS-6830
Project: Apache Ozone
Issue Type: Sub-task
Reporter: Uma Maheswara Rao G
This issue may be shaded because we have a sanity check at the end of
chooseDatanodes method and throw SCM Exception. However, it fail in the above
checks itself if it cannot choose enough nodes. With the sanity check the
following condition we may not meet, but we can still investigate why
SCMContainerPlacementRackScatter giving up silently without exception.
{code:java}
2022-05-19 20:15:35,536 ERROR org.apache.ratis.statemachine.StateMachine:
Terminating with exit status 1: Nodes size=4, replication factor=5 do not match
java.lang.IllegalArgumentException: Nodes size=4, replication factor=5 do not
match at
com.google.common.base.Preconditions.checkArgument(Preconditions.java:303) at
org.apache.hadoop.hdds.scm.pipeline.PipelineStateMap.addPipeline(PipelineStateMap.java:74)
at
org.apache.hadoop.hdds.scm.pipeline.PipelineStateManagerImpl.addPipeline(PipelineStateManagerImpl.java:99)
at jdk.internal.reflect.GeneratedMethodAccessor222.invoke(Unknown Source) at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566) at
org.apache.hadoop.hdds.scm.ha.SCMStateMachine.process(SCMStateMachine.java:168)
at
org.apache.hadoop.hdds.scm.ha.SCMStateMachine.applyTransaction(SCMStateMachine.java:139)
at
org.apache.ratis.server.impl.RaftServerImpl.applyLogToStateMachine(RaftServerImpl.java:1723)
at
org.apache.ratis.server.impl.StateMachineUpdater.applyLog(StateMachineUpdater.java:234)
at
org.apache.ratis.server.impl.StateMachineUpdater.run(StateMachineUpdater.java:179)
at java.base/java.lang.Thread.run(Thread.java:834){code}
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