[HBASE-9026] RestartRsHoldingRoot action in org.apache.hadoop.hbase.util.ChaosMonkey restarting the server holding .META. instead of -ROOT-

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.94.8
• Fix Version/s: 0.94.11
• Hadoop Flags: Reviewed
• Assignee: Y. SREENIVASULU REDDY
• Reporter: Y. SREENIVASULU REDDY
• Created: 23/Jul/13 09:56
• Updated: 21/Aug/13 00:08
• Resolved: 25/Jul/13 02:54

Description

In ChaosMonkey instead of restarting Root holded regionServer it is restarting META holded regionServer.

public static class RestartRsHoldingRoot extends RestartRandomRs {
    public RestartRsHoldingRoot(long sleepTime) {
      super(sleepTime);
    }
    @Override
    void perform() throws Exception {
      LOG.info("Performing action: Restart region server holding ROOT");
      ServerName server = cluster.getServerHoldingMeta();
      if (server == null) {
        LOG.warn("No server is holding -ROOT- right now.");
        return;
      }
      restartRs(server, sleepTime);
    }
  }

13/07/23 17:03:54 INFO util.ChaosMonkey: Performing action: Restart region server holding ROOT
13/07/23 17:03:54 DEBUG client.HConnectionManager$HConnectionImplementation: Looked up root region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@52b57e9a; serverName=ocean06,60020,1374569995361
13/07/23 17:03:54 DEBUG client.HConnectionManager$HConnectionImplementation: Removed .META.,,1.1028785192 for tableName=.META. from cache because of 
13/07/23 17:03:54 DEBUG client.HConnectionManager$HConnectionImplementation: Cached location for .META.,,1.1028785192 is ocean06:60020
13/07/23 17:03:54 INFO util.ChaosMonkey: Killing region server:ocean06,60020,1374569995361
13/07/23 17:03:54 INFO hbase.HBaseCluster: Aborting RS: ocean06,60020,1374569995361
13/07/23 17:03:54 INFO hbase.ClusterManager: Executing remote command: ps ux | grep regionserver  | grep hbase | grep -v grep | tr -s ' ' | cut -d ' ' -f2 | xargs kill -s SIGKILL , hostname:ocean06
13/07/23 17:03:54 INFO util.Shell: Executing full command [/usr/bin/ssh  ocean06 "ps ux | grep regionserver  | grep hbase | grep -v grep | tr -s ' ' | cut -d ' ' -f2 | xargs kill -s SIGKILL"]
13/07/23 17:03:54 INFO hbase.ClusterManager: Executed remote command, exit code:0 , output:
13/07/23 17:03:54 INFO hbase.HBaseCluster: Waiting service:regionserver to stop: ocean06,60020,1374569995361
13/07/23 17:03:54 INFO hbase.ClusterManager: Executing remote command: ps ux | grep regionserver  | grep hbase | grep -v grep | tr -s ' ' | cut -d ' ' -f2 , hostname:ocean06
13/07/23 17:03:54 INFO util.Shell: Executing full command [/usr/bin/ssh  ocean06 "ps ux | grep regionserver  | grep hbase | grep -v grep | tr -s ' ' | cut -d ' ' -f2"]
13/07/23 17:03:55 INFO hbase.ClusterManager: Executed remote command, exit code:0 , output:
13/07/23 17:03:55 INFO util.ChaosMonkey: Killed region server:ocean06,60020,1374569995361. Reported num of rs:2

This is only in 0.94.X