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Stephen Yuan Jiang commented on HBASE-13935: -------------------------------------------- [~enis] This JIRA is only for HBASE 1.x and lower releases. We had logic of first check META and then check znode. The issue happens when table not in META , but in znode as ENABLED/ENABLING. This is NOT a issue in master, as we don't use zookeeper to track table state. The table state is tracked in META table - so we only check META. > Orphaned namespace table ZK node should not prevent master to start > ------------------------------------------------------------------- > > Key: HBASE-13935 > URL: https://issues.apache.org/jira/browse/HBASE-13935 > Project: HBase > Issue Type: Bug > Components: master > Affects Versions: 1.0.0, 0.98.13 > Reporter: Stephen Yuan Jiang > Assignee: Stephen Yuan Jiang > Fix For: 0.98.14, 1.0.2, 1.2.0, 1.1.1 > > Attachments: HBASE-13935.v1-0.98.patch, > HBASE-13935.v1-branch-1.0.patch, HBASE-13935.v1-branch-1.patch > > > Before we have the state-of-art Procedure V2 feature (HBASE 1.0 release or > older), we frequently see the following issue (orphaned ZK node) that prevent > master to start (at least in testing): > {noformat} > 2015-06-16 17:54:36,472 FATAL [master:10.0.0.99:60000] master.HMaster: > Unhandled exception. Starting shutdown. > org.apache.hadoop.hbase.TableExistsException: hbase:namespace > at > org.apache.hadoop.hbase.master.handler.CreateTableHandler.prepare(CreateTableHandler.java:137) > at > org.apache.hadoop.hbase.master.TableNamespaceManager.createNamespaceTable(TableNamespaceManager.java:232) > at > org.apache.hadoop.hbase.master.TableNamespaceManager.start(TableNamespaceManager.java:86) > at > org.apache.hadoop.hbase.master.HMaster.initNamespace(HMaster.java:1123) > at > org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:947) > at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:618) > at java.lang.Thread.run(Thread.java:745) > 2015-06-16 17:54:36,472 INFO [master:10.0.0.99:60000] master.HMaster: > Aborting > {noformat} > The above call trace is from a 0.98.x test run. We saw similar issue in > 1.0.x run, too. > The proposed fix is to ignore the zk node and force namespace table creation > to be complete so that master can start successfully. -- This message was sent by Atlassian JIRA (v6.3.4#6332)