[jira] [Created] (HDFS-16676) DatanodeAdminManager$Monitor reports a node as invalid forever

["Prabhu Joseph (Jira)" <ji...@apache.org>]

Prabhu Joseph created HDFS-16676:
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             Summary: DatanodeAdminManager$Monitor reports a node as invalid forever
                 Key: HDFS-16676
                 URL: https://issues.apache.org/jira/browse/HDFS-16676
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: namenode
    Affects Versions: 3.2.1
            Reporter: Prabhu Joseph
            Assignee: Prabhu Joseph


DatanodeAdminManager$Monitor reports a node as invalid forever

{code}
2022-07-21 06:54:38,562 WARN org.apache.hadoop.hdfs.server.blockmanagement.DatanodeAdminManager (DatanodeAdminMonitor-0): DatanodeAdminMonitor caught exception when processing node 1.2.3.4:9866.
java.lang.IllegalStateException: Node 1.2.3.4:9866 is in an invalid state! Invalid state: In Service 0 blocks are on this dn.
        at com.google.common.base.Preconditions.checkState(Preconditions.java:172)
        at org.apache.hadoop.hdfs.server.blockmanagement.DatanodeAdminManager$Monitor.check(DatanodeAdminManager.java:601)
        at org.apache.hadoop.hdfs.server.blockmanagement.DatanodeAdminManager$Monitor.run(DatanodeAdminManager.java:504)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
        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:750)
{code}

A node goes into invalid state when stopDecommission sets the node to IN-Service and misses to remove from pendingNodes queues (HDFS-16675). This will be corrected only when user triggers startDecommission. Till then we need not keep the invalid state node in the queue as anyway startDecommission will add it back.



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