Dear Wiki user, You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification.
The "Hbase/Troubleshooting" page has been changed by AndrewPurtell: http://wiki.apache.org/hadoop/Hbase/Troubleshooting?action=diff&rev1=28&rev2=29 1. [[#10|Problem: Scanners keep getting timeouts]] 1. [[#11|Problem: Client says no such table but it exists]] 1. [[#12|Problem: Could not find my address: xyz in list of ZooKeeper quorum servers]] + 1. [[#13|Problem: Long client pauses under high load; or deadlock if using THBase]] <<Anchor(1)>> == 1. Problem: Master initializes, but Region Servers do not == @@ -194, +195 @@ === Resolution === * Use the hostname presented in the error message instead of the value you used. If you have a DNS server, you can set '''hbase.zookeeper.dns.interface''' and '''hbase.zookeeper.dns.nameserver''' in hbase-site.xml to make sure it resolves to the correct FQDN. + <<Anchor(13)>> + == 13. Problem: Long client pauses under high load; or deadlock if using THBase == + * Under high load, some client operations take a long time; waiting appears uneven + * If using transactional HBase (THBase), apparent deadlocks: for example, in thread dumps IPC Server handlers are blocked in org.apache.hadoop.hbase.regionserver.tableindexed.IndexedRegion.updateIndex() + == Causes == + * The default number of regionserver RPC handlers is insufficient. + == Resolution == + * Increase the value of "hbase.regionserver.handler.count" in hbase-site.xml. The default is 10. Try 100. +
