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https://issues.apache.org/jira/browse/HBASE-15109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15567324#comment-15567324
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Pankaj Kumar commented on HBASE-15109:
--------------------------------------
Thanks [~tedyu] and [~stack] for reviewing the patch. We should have this fix
in other branches as well, will add patch.
> HM/RS failed to start when "fs.hdfs.impl.disable.cache" is set to true
> ----------------------------------------------------------------------
>
> Key: HBASE-15109
> URL: https://issues.apache.org/jira/browse/HBASE-15109
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 2.0.0
> Reporter: Pankaj Kumar
> Assignee: Pankaj Kumar
> Priority: Critical
> Fix For: 2.0.0
>
> Attachments: HBASE-15109-V2.patch, HBASE-15109-branch-1.patch,
> HBASE-15109.patch, HBASE-15109.patch
>
>
> HMaster failed to start during installing ShutdownHook when
> "fs.hdfs.impl.disable.cache" is set to true.
> {noformat}
> 2016-10-10 10:33:28,367 FATAL [master/HOST-10-18-106-146/10.18.106.146:16000]
> master.HMaster: Unhandled: Failed suppression of fs shutdown hook:
> org.apache.hadoop.fs.FileSystem$Cache$ClientFinalizer@19a003b4
> java.lang.RuntimeException: Failed suppression of fs shutdown hook:
> org.apache.hadoop.fs.FileSystem$Cache$ClientFinalizer@19a003b4
> at
> org.apache.hadoop.hbase.regionserver.ShutdownHook.suppressHdfsShutdownHook(ShutdownHook.java:204)
> at
> org.apache.hadoop.hbase.regionserver.ShutdownHook.install(ShutdownHook.java:84)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:950)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
> And RegionServer is in blocking state until a master is available,
> {noformat}
> "regionserver/HOST-10-18-106-146/10.18.106.146:16020" #17 prio=5 os_prio=0
> tid=0x0000000000e4e800 nid=0xdc38 in Object.wait() [0x00007f329dac6000]
> java.lang.Thread.State: TIMED_WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at
> org.apache.hadoop.hbase.zookeeper.ZooKeeperNodeTracker.blockUntilAvailable(ZooKeeperNodeTracker.java:159)
> - locked <0x00000000ae25c0c8> (a
> org.apache.hadoop.hbase.zookeeper.MasterAddressTracker)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.blockAndCheckIfStopped(HRegionServer.java:870)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.initializeZooKeeper(HRegionServer.java:809)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.preRegistrationInitialization(HRegionServer.java:783)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:943)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
> During installation, first time it will try to suppress the HDFS shutdownhook
> by removing the hdfsclientfinalizer from HDFS. Since
> fs.hdfs.impl.disable.cache is enabled, so removal will be unsuccessful from
> HDFS (FS is not cached) and RuntimeException will be thrown with "Failed
> suppression of fs shutdown hook" message.
> In ShutdownHook,
> {code}
> if (!fsShutdownHooks.containsKey(hdfsClientFinalizer) &&
> !ShutdownHookManager.deleteShutdownHook(hdfsClientFinalizer)) {
> throw new RuntimeException("Failed suppression of fs shutdown hook: " +
> hdfsClientFinalizer);
> }
> {code}
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