Xiaolin Ha created HBASE-25923:
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             Summary: Region state stuck in PENDING_OPEN
                 Key: HBASE-25923
                 URL: https://issues.apache.org/jira/browse/HBASE-25923
             Project: HBase
          Issue Type: Improvement
          Components: master, Region Assignment
    Affects Versions: 1.0.0
            Reporter: Xiaolin Ha
            Assignee: Xiaolin Ha


Region will not be reassigned if encounters ConnectionClosingException, and 
then it will stuck in PENDING_OPEN state. Error logs are as follows,
{code:java}
INFO  
[jd-data-hbase02.gh.sankuai.com,16000,1621944138744-GeneralBulkAssigner-12] 
master.AssignmentManager: Unable to communicate with 
jd-data-hbase15.gh.sankuai.com,16020,1622026221268 in order to assign regions, 
org.apache.hadoop.hbase.exceptions.ConnectionClosingException: Call to 
jd-data-hbase15.gh.sankuai.com/10.78.96.166:16020 failed on local exception: 
org.apache.hadoop.hbase.exceptions.ConnectionClosingException: Connection to 
jd-data-hbase15.gh.sankuai.com/10.78.96.166:16020 is closing. Call id=19239, 
waitTime=1
        at 
org.apache.hadoop.hbase.ipc.AbstractRpcClient.wrapException(AbstractRpcClient.java:289)
        at 
org.apache.hadoop.hbase.ipc.RpcClientImpl.call(RpcClientImpl.java:1270)
        at 
org.apache.hadoop.hbase.ipc.AbstractRpcClient.callBlockingMethod(AbstractRpcClient.java:227)
        at 
org.apache.hadoop.hbase.ipc.AbstractRpcClient$BlockingRpcChannelImplementation.callBlockingMethod(AbstractRpcClient.java:336)
        at 
org.apache.hadoop.hbase.protobuf.generated.AdminProtos$AdminService$BlockingStub.openRegion(AdminProtos.java:25890)
        at 
org.apache.hadoop.hbase.master.ServerManager.sendRegionOpen(ServerManager.java:798)
        at 
org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1744)
        at 
org.apache.hadoop.hbase.master.GeneralBulkAssigner$SingleServerBulkAssigner.run(GeneralBulkAssigner.java:203)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.hadoop.hbase.exceptions.ConnectionClosingException: 
Connection to jd-data-hbase15.gh.sankuai.com/10.78.96.166:16020 is closing. 
Call id=19239, waitTime=1
        at 
org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.cleanupCalls(RpcClientImpl.java:1083)
        at 
org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.close(RpcClientImpl.java:863)
        at 
org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.run(RpcClientImpl.java:580)
{code}



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