question Re: Meta table is not Online in Support Questions

Meta table is not Online

Nishan — Fri, 16 Sep 2022 08:58:57 GMT

Hi every one,

I did some load testing on my hbase cluster based on cdh 4.6 .Data got inserted correctly on hbase tables and also indexed on solr as I am using lily.How ever when I try to ingest data now I am getting the below exception and also not able to scan any tables.

Looks like clinet is not able to find meta table from zoo keeper location.Can some one help?

org.apache.hadoop.hbase.client.ScannerCallable@724715dd, org.apache.hadoop.hbase.NotServingRegionException: org.apache.hadoop.hbase.NotServingRegionException: Region is not online: .META.,,1
at org.apache.hadoop.hbase.regionserver.HRegionServer.getRegion(HRegionServer.java:3559)
at org.apache.hadoop.hbase.regionserver.HRegionServer.internalOpenScanner(HRegionServer.java:2557)
at org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:2538)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:323)
at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1428)

Re: Meta table is not Online

Nishan — Wed, 14 May 2014 19:57:44 GMT

Hi ,

Can some one help?

Re: Meta table is not Online

jxiang — Wed, 14 May 2014 20:04:09 GMT

>From the master web UI, do you see if the meta region in transition?

Re: Meta table is not Online

Nishan — Wed, 14 May 2014 20:13:46 GMT

Yes.Meta region is in transition from the master web UI

1028785192

.META.,,1.1028785192 state=CLOSING

Re: Meta table is not Online

jxiang — Wed, 14 May 2014 20:21:09 GMT

How long has it stuck there? You can check where it is trying to open, find
out anything wrong from the log. You may try to manually fail over your
master to see if it can fix the issue. Otherwise, you may need to use hbck.

Re: Meta table is not Online

Nishan — Wed, 14 May 2014 20:40:29 GMT

Thank you.It has been in this state for more than a day now.I tried to fail over the master but still the problem persist.

Re: Meta table is not Online

jxiang — Wed, 14 May 2014 20:49:09 GMT

That's bad. Do you see anything wrong in the region server log? How many
regions in total do you have?

Re: Meta table is not Online

Nishan — Wed, 14 May 2014 21:40:59 GMT

I have 5 region servers in this trial environment that was set up.There is only one on line region when I check the master web UI.I ran some heavy load against this yesterday while perfroming a rolling re start of the cluster.It was all well vbefore that .I am not able to bring it back to work since then.

The region server logs does not have any information.

Re: Meta table is not Online

jxiang — Wed, 14 May 2014 22:38:09 GMT

Have you tried to restart the whole cluster, use hbck to fix
meta/assignment? Is the log level DEBUG? If so, you should get quite some
information. Without knowing why it is stuck, it would be hard to fix.

Re: Meta table is not Online

Nish — Thu, 15 May 2014 16:42:34 GMT

Thank you.I tried runing hbase hbck as root user but it says I do not have enough permission.I am trying run this as user hbase but It asks for the habse password.Can you help?

14/05/15 16:26:47 WARN util.HBaseFsck: Got AccessControlException when preCheckPermission
org.apache.hadoop.security.AccessControlException: Permission denied: action=WRITE path=hdfs://nameservice1/hbase/-ROOT- user=root
at org.apache.hadoop.hbase.util.FSUtils.checkAccess(FSUtils.java:1333)
at org.apache.hadoop.hbase.util.HBaseFsck.preCheckPermission(HBaseFsck.java:1433)
at org.apache.hadoop.hbase.util.HBaseFsck.exec(HBaseFsck.java:3653)
at org.apache.hadoop.hbase.util.HBaseFsck.run(HBaseFsck.java:3502)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
at org.apache.hadoop.hbase.util.HBaseFsck.main(HBaseFsck.java:3493)

Re: Meta table is not Online

jdavis — Thu, 15 May 2014 16:45:52 GMT

If you have root access you should be able to launch hbck as the hbase user via the following:

sudo -u hbase hbase hbck ...