Hi All, We are currently working on provisioning support in Amdatu, enabling hot deployment of Amdatu application bundles. Within the scope of that milestone it is stated that all Amdatu bundles should be hot deployable. With the current Cassandra (0.8) version however, a runtime update is just not possible. The Cassandra daemon was not designed to be stopped in ways other than killing the JVM. I did already run into that issue (see CassandraDaemonService), but without changing Cassandra it just doesn't seem to be possible to support runtime updates of the Cassandra daemon bundle. The Cassandra guru's (Jonathan Ellis and Ran Tavory) confirm that Cassandra was not designed to facilitate shutdown in other ways then killing the JVM.
See also: http://prettyprint.me/2010/02/14/running-cassandra-as-an-embedded-service/ [Michael Zehrer] Is there a solution for the shutdown problem? One that does not require me to kill the JVM? [Ran Tavory ] no, that's a design limitation in Cassandra [Kannan ] Thanks for putting up this embedded server, very helpful. Any ideas why this is a cassandra design limitation ? [Ran Tavory ] you mean why it cannot be killed? it's been discussed at user@cassandra a few times. Basically it's a design decision and was never considered important enough to rethink it Related JIRA issues: https://issues.apache.org/jira/browse/CASSANDRA-2724 https://issues.apache.org/jira/browse/CASSANDRA-868 https://issues.apache.org/jira/browse/CASSANDRA-1919 https://github.com/rantav/hector/issues/182 More about Cassandra shutdown: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Few-questions-regarding-cassandra-deployment-on-windows-td5508524.html https://groups.google.com/group/hector-users/browse_thread/thread/f94097f645024c0b?pli=1 http://stackoverflow.com/questions/3388558/how-can-i-start-start-apache-cassandra-programmatically Is this is big issue for provisioning? Regards, Ivo GX Software | Ivo Ladage-van Doorn | Product Architect | Wijchenseweg 111 | 6538 SW Nijmegen | The Netherlands | T +31(0)24 - 388 82 61 | F +31(0)24 - 388 86 21 | [email protected]<mailto:[email protected]> | www.gxsoftware.com<http://www.gxsoftware.com> | twitter.com/GXSoftware<http://twitter.com/GXSoftware>
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