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https://issues.apache.org/jira/browse/HBASE-15109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15110566#comment-15110566
]
Pankaj Kumar commented on HBASE-15109:
--------------------------------------
Two approach can be adopted here when fs.hdfs.impl.disable.cache is set true,
- During installation, skip suppressing HDFS shutdownhook.
{code}
boolean disabledFsCache =
fs.getConf().getBoolean("fs.hdfs.impl.disable.cache", false);
if (!disabledFsCache &&
!fsShutdownHooks.containsKey(hdfsClientFinalizer) &&
!ShutdownHookManager.deleteShutdownHook(hdfsClientFinalizer)) {
throw new RuntimeException("Failed suppression of fs shutdown hook: "
+
hdfsClientFinalizer);
}
{code}
OR
- we can disable shutdownhook feature completely by having check in
HRegionServer when fs.hdfs.impl.disable.cache is set true ,
{code}
boolean disabledFsCache =
fs.getConf().getBoolean("fs.hdfs.impl.disable.cache", false);
if(!disabledFsCache){
ShutdownHook.install(conf, fs, this, Thread.currentThread());
}
{code}
> Region server 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: 1.0.0
> Reporter: Pankaj Kumar
> Assignee: Pankaj Kumar
> Priority: Critical
>
> Region server failed to start during installing ShutdownHook when
> "fs.hdfs.impl.disable.cache" is set to true in core-site.xml at HBase side.
> {code}
> 2016-01-14 15:30:56,358 | FATAL | regionserver/ds2/192.168.152.230:21302 |
> ABORTING region server ds2,21302,1452756654352: Unhandled: Failed suppression
> of fs shutdown hook:
> org.apache.hadoop.fs.FileSystem$Cache$ClientFinalizer@571527d6 |
> org.apache.hadoop.hbase.regionserver.HRegionServer.abort(HRegionServer.java:2054)
> java.lang.RuntimeException: Failed suppression of fs shutdown hook:
> org.apache.hadoop.fs.FileSystem$Cache$ClientFinalizer@571527d6
> 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:893)
> at java.lang.Thread.run(Thread.java:745)
> {code}
> 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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