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  1. HBase
  2. HBASE-10833

Region assignment may fail during cluster start up

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      Description

      This is an intermittent & infrequent issue. It happens when a cluster is starting up, only when one region server is available for region assignment temporally and master has a transient issue to talk to the only RS

      When the RPC layer has a hiccup to talk to a RS, the RS will be put in failed server list and it will stay in failed server list for 2 sec(default value).

      While the 20 region retires completes much shorter than 2 secs, the end result is a failed assignment.

      Below are the logging for the total time spent on 20 assignment retires, it only took about 36 ms for all the retries.

      2014-03-24 18:14:43,451 WARN  [AM.ZK.Worker-pool2-t59] master.AssignmentManager: Failed assignment of hbase:labels,,1395668310177.f7372ede6c8bd7de4e91bfeda884cffb. to hor15n18.gq1.ygridcore.net,60020,1395684489232, trying to assign elsewhere instead; try=1 of 20
      ….
      2014-03-24 18:14:43,487 WARN  [AM.ZK.Worker-pool2-t59] master.AssignmentManager: Failed assignment of hbase:labels,,1395668310177.f7372ede6c8bd7de4e91bfeda884cffb. to hor15n18.gq1.ygridcore.net,60020,1395684489232, trying to assign elsewhere instead; try=20 of 20
      

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            • Assignee:
              jeffreyz Jeffrey Zhong
              Reporter:
              jeffreyz Jeffrey Zhong
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