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From "Ole Solberg (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-3617) failover on slave hangs after stopmaster on master.
Date Wed, 16 Apr 2008 11:17:21 GMT

    [ https://issues.apache.org/jira/browse/DERBY-3617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12589500#action_12589500
] 

Ole Solberg commented on DERBY-3617:
------------------------------------

I am running the test programmatically which means the timing will be different from when
testing manually  via ij.

Here is what I found by instrumenting the test some more:

A)
If I add a sleep between the startMaster and the stopMaster the failover will not hang:
.
.
startSlave
startMaster
sleep(10000L)
stopMaster
failOver
  Gets SQLSTATE: XRE07, SQLERRMC: Could not perform operation because the database is not
in replication master mode.
connect slave: [localhost:4527//export/home/tmp/os136789/testingInMyDerbySandbox/db_slave/wombat]
  CONNECTED

B)
Without this sleep the hang occurs:
.
.
startSlave
startMaster
stopMaster
connect slave: SQLSTATE: 08004, SQLERRMC: Connection refused to database '/export/home/tmp/os136789/testingInMyDerbySandbox/db_slave/wombat'
because it is in replication slave mode.'
sleep(10000L) // No effect.
connect slave: SQLSTATE: 08004, SQLERRMC: Connection refused to database '/export/home/tmp/os136789/testingInMyDerbySandbox/db_slave/wombat'
because it is in replication slave mode.'
failOver
   HANGS!



In case A): should not the failover ('connect  failover=true') return a valid connection according
to the spec.?

> failover on slave hangs after stopmaster on master.
> ---------------------------------------------------
>
>                 Key: DERBY-3617
>                 URL: https://issues.apache.org/jira/browse/DERBY-3617
>             Project: Derby
>          Issue Type: Bug
>          Components: Replication
>    Affects Versions: 10.5.0.0
>         Environment: OS: Fedora release 7 (Moonshine) 32bits - Linux 2.6.23.15-80.fc7PAE
#1 SMP Sun Feb 10 17:14:36 EST 2008 GNU/Linux
> JVM: java version "1.6.0_01"
> Java(TM) SE Runtime Environment (build 1.6.0_01-b06)
> Java HotSpot(TM) Server VM (build 1.6.0_01-b06, mixed mode)
> SVN: 647063
>            Reporter: Ole Solberg
>            Assignee: V.Narayanan
>            Priority: Minor
>         Attachments: db_master-derby.log, db_slave-derby.log, log.out
>
>
> 0. Master and slave in repl. mode.
> 1. master: stopmaster
> 2. slave failover.
>    hangs.....
> According to "Functional Specification for Derby Replication" Rev. 9.0:
> "Failover": "... . The command is only accepted  on the slave if the network conection
with the master is down." so expecting failover to return valid Connection.
> However, failover never finish.
> See attached master and slave derby.log and testrun log.out.

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