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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1965) On restart of branch, master complains about not being able to set safe mode
Date Mon, 09 Nov 2009 23:28:32 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12775187#action_12775187
] 

stack commented on HBASE-1965:
------------------------------

Here's a hack patch:

{code}
Index: src/java/org/apache/hadoop/hbase/zookeeper/ZooKeeperWrapper.java
===================================================================
--- src/java/org/apache/hadoop/hbase/zookeeper/ZooKeeperWrapper.java    (revision 833622)
+++ src/java/org/apache/hadoop/hbase/zookeeper/ZooKeeperWrapper.java    (working copy)
@@ -501,6 +501,11 @@
       LOG.warn("Failed to create out of safe mode in ZooKeeper: " + e);
     } catch (KeeperException e) {
       LOG.warn("Failed to create out of safe mode in ZooKeeper: " + e);
+      if (e.getMessage().contains("KeeperErrorCode = NodeExists")) {
+        LOG.info("Node exists; just move on");
+        return true;
+      }
+
     }
{code}


It does this:

{code}
2009-11-09 23:23:37,868 [IPC Server handler 8 on 60001] WARN org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper:
Failed to create out of safe mode in ZooKeeper: org.apache.zookeeper.KeeperException$NodeExistsException:
KeeperErrorCode = NodeExists for /hbase/safe-mode
2009-11-09 23:23:37,868 [IPC Server handler 8 on 60001] INFO org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper:
Node exists; just move on
{code}


Seems to work.

This is for branch only.  Safe-mode is gone in TRUNK

> On restart of branch, master complains about not being able to set safe mode
> ----------------------------------------------------------------------------
>
>                 Key: HBASE-1965
>                 URL: https://issues.apache.org/jira/browse/HBASE-1965
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
>
> A few fellows have reported this issue.  I see it myself if I restart the cluster.  
You'll see:
> {code}
> ZooKeeperWrapper: Failed to create out of safe mode in ZooKeeper: org.apache.zookeeper.KeeperException$NodeExistsException:
KeeperErrorCode = NodeExists for /hbase/safe-mode
> {code}
> ... over and over again in master log.

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