have a peek at https://issues.apache.org/jira/browse/AMQ-3654?focusedCommentId=13294679&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13294679
which requires a 5.7-SNAPSHOT On 18 July 2012 07:31, SergueiM <[email protected]> wrote: > Hi, > > A jdbc Master/Slave cluster. > The following steps bring me into a 'no Master' state, causing AMQ clients > to fail. > > Layout. > two brokers: > - Master, AMQ v.5.6 on Ubuntu 10.04 host; > - Slave, AMQ v.5.5.1 on Win 7 host. > Postgres 9 on yet another Ubuntu 12.04 host. > Sun Java 6 SDK on all hosts; all 64bit. > > Step 1: No connection to DB. > Master looses connection to DB due to networking issues. > - Master does not die; > - Slave does not pickup. > > Step 2: > While Master in its hanging mode I tried to start yet another Slave. > - new Slave came up waiting to become the Master. > Stopped the newly initialized Slave. > > ~10 minutes later. > > Step 3: Connection is back. > - The earlier broken Master's network connection was restored. > - Master shuts itself down, posting the errors: > ERROR | Failed to update database lock: org.postgresql.util.PSQLException: > An I/O error occured while sending to the backend. > INFO | No longer able to keep the exclusive lock so giving up being a master > INFO | ActiveMQ Message Broker (jdbcBroker, ID:ubu2-55120-1342587112479-0:1) > is shutting down > INFO | Connector default Stopped > INFO | > PListStore:[/opt/activemq-installs/apache-activemq-5.6.0/bin/activemq-data/jdbcBroker/tmp_storage > ] stopped > WARN | Exception while rollbacking the connection on shutdown > INFO | ActiveMQ JMS Message Broker (jdbcBroker, > ID:ubu2-55120-1342587112479-0:1) stopped > > - Slave does not pick up, still waiting to become the Master. > > Step 4: No Master > Tried to start the Master again. > - It gets into waiting to become the Master, same as Slave. > > I've got no Master because of the temporary networking issue. > > Any ideas how can I avoid it? > Thank you. > > - > Serguei > > > > > -- > View this message in context: > http://activemq.2283324.n4.nabble.com/jdbc-Master-Slave-lockup-no-active-Master-clients-fail-tp4654110.html > Sent from the ActiveMQ - User mailing list archive at Nabble.com. -- http://fusesource.com http://blog.garytully.com
