Undo server abort from HBASE-14968

2016-08-03 19:56:57,693 INFO  [B.priority.fifo.QRpcServer.handler=4,queue=0,port=20000] master.ServerManager: Registering server=hbase-bug58335-6.openstacklocal,16020,1470254212713
2016-08-03 19:57:00,062 INFO  [main-EventThread] coordination.SplitLogManagerCoordination: task /hbase-secure/splitWAL/WALs%2Fhbase-bug58335-6.openstacklocal%2C16020%2C1470253655579-splitting%2Fhbase-bug58335-6.openstacklocal%252C16020%252C1470253655579.default.1470253660327 entered state: ERR hbase-bug58335-4.openstacklocal,16020,1470253592920
2016-08-03 19:57:00,064 WARN  [main-EventThread] coordination.SplitLogManagerCoordination: Error splitting /hbase-secure/splitWAL/WALs%2Fhbase-bug58335-6.openstacklocal%2C16020%2C1470253655579-splitting%2Fhbase-bug58335-6.openstacklocal%252C16020%252C1470253655579.default.1470253660327
2016-08-03 19:57:00,064 WARN  [MASTER_SERVER_OPERATIONS-hbase-bug58335-7:20000-0] master.SplitLogManager: error while splitting logs in [hdfs://hbase-bug58335-7.openstacklocal:8020/apps/hbase/data/WALs/hbase-bug58335-6.openstacklocal,16020,1470253655579-splitting] installed = 1 but only 0 done
2016-08-03 19:57:00,065 ERROR [MASTER_SERVER_OPERATIONS-hbase-bug58335-7:20000-0] executor.EventHandler: Caught throwable while processing event M_SERVER_SHUTDOWN
java.io.IOException: failed log splitting for hbase-bug58335-6.openstacklocal,16020,1470253655579, will retry
        at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.resubmit(ServerShutdownHandler.java:357)
        at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.process(ServerShutdownHandler.java:220)
        at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:129)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: error or interrupted while splitting logs in [hdfs://hbase-bug58335-7.openstacklocal:8020/apps/hbase/data/WALs/hbase-bug58335-6.openstacklocal,16020,1470253655579-splitting] Task = installed = 1 done = 0 error = 1
        at org.apache.hadoop.hbase.master.SplitLogManager.splitLogDistributed(SplitLogManager.java:290)
        at org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:393)
        at org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:366)
        at org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:288)
        at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.process(ServerShutdownHandler.java:213)
        ... 4 more
2016-08-03 19:57:00,067 FATAL [MASTER_SERVER_OPERATIONS-hbase-bug58335-7:20000-0] master.HMaster: Master server abort: loaded coprocessors are: [org.apache.ranger.authorization.hbase.RangerAuthorizationCoprocessor, org.apache.hadoop.hbase.backup.master.BackupController]
2016-08-03 19:57:00,067 FATAL [MASTER_SERVER_OPERATIONS-hbase-bug58335-7:20000-0] master.HMaster: Caught throwable while processing event M_SERVER_SHUTDOWN
java.io.IOException: failed log splitting for hbase-bug58335-6.openstacklocal,16020,1470253655579, will retry
        at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.resubmit(ServerShutdownHandler.java:357)
        at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.process(ServerShutdownHandler.java:220)
        at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:129)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: error or interrupted while splitting logs in [hdfs://hbase-bug58335-7.openstacklocal:8020/apps/hbase/data/WALs/hbase-bug58335-6.openstacklocal,16020,1470253655579-splitting] Task = installed = 1 done = 0 error = 1
        at org.apache.hadoop.hbase.master.SplitLogManager.splitLogDistributed(SplitLogManager.java:290)
        at org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:393)
        at org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:366)
        at org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:288)
        at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.process(ServerShutdownHandler.java:213)
        ... 4 more

  private void resubmit(final ServerName serverName, IOException ex) throws IOException {
    // typecast to SSH so that we make sure that it is the SSH instance that
    // gets submitted as opposed to MSSH or some other derived instance of SSH
    this.services.getExecutorService().submit((ServerShutdownHandler) this);
    this.deadServers.add(serverName);
    throw new IOException("failed log splitting for " + serverName + ", will retry", ex);
  }

  protected void handleException(Throwable t) {
    String msg = "Caught throwable while processing event " + eventType;
    LOG.error(msg, t);
    if (server != null) {
      server.abort(msg, t);
    }
  }