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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-9448) [0.94] Shell needs to fall back after HBASE-9182 if talking to older servers
Date Thu, 05 Sep 2013 23:50:52 GMT

     [ https://issues.apache.org/jira/browse/HBASE-9448?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell updated HBASE-9448:
----------------------------------

    Attachment: 9448.patch

Attached a patch tested with an 0.94.7 server and an 0.94.12-SNAPSHOT client, and with an
0.94.12-SNAPSHOT server and client with security enabled. First we try the old API for sake
of compatibility with older servers. If we receive an AccessDeniedException specifically,
we try the new getTableNames API. Doing it this way avoids an ugly but harmless exception
in the log of the older server. Two round trips to get the list in the worst case seems fine
here because the 'list' shell command runs on a human timescale.
                
> [0.94] Shell needs to fall back after HBASE-9182 if talking to older servers
> ----------------------------------------------------------------------------
>
>                 Key: HBASE-9448
>                 URL: https://issues.apache.org/jira/browse/HBASE-9448
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: Andrew Purtell
>            Priority: Blocker
>             Fix For: 0.94.12
>
>         Attachments: 9448.patch
>
>
> Here's what I see in a new (0.94.12) client connecting to an old (0.94.7) cluster and
doing a "list" in the shell:
> {code}
> ERROR: org.apache.hadoop.ipc.RemoteException: java.io.IOException: java.lang.NoSuchMethodException:
org.apache.hadoop.hbase.ipc.HMasterInterface.getTableNames()
> 	at java.lang.Class.getMethod(Class.java:1624)
> 	at org.apache.hadoop.hbase.ipc.SecureRpcEngine$Server.call(SecureRpcEngine.java:293)
> 	at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1426)
> {code}

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