This problem only shows up when both the writer and the reader try to update the same socket channel. A writer only needs to update the channel if it can't write the whole message in one write call. So, if one only updates and reads a small column at a time, this problem may not show up.
Jun IBM Almaden Research Center K55/B1, 650 Harry Road, San Jose, CA 95120-6099 [email protected] Sandeep Tata <[email protected]> wrote on 06/23/2009 10:07:13 AM: > Jun -- this is a great catch. > Do you know if this problem is reproducible with smaller column values? From > your example, it looks like it might. > > If it *isn't* I'd be comfortable going ahead with RC2 as the 0.3.0 release > and rolling this and other bugfixes into 0.3.1. > > > On Tue, Jun 23, 2009 at 9:34 AM, Jun Rao <[email protected]> wrote: > > > Under heavy load and large column values (10s of Ks), we observed that > > cassandra TCP channels can get jammed. A new patch is provided to > > https://issues.apache.org/jira/browse/CASSANDRA-220. > > > > I see two options: > > 1) patch #220 to 0.3.0 and release RC3 > > 2) release RC2 with a release note that describes the above potential > > problem. > > > > What do people feel? > > > > Jun > > IBM Almaden Research Center > > K55/B1, 650 Harry Road, San Jose, CA 95120-6099 > > > > [email protected] > > > > > > [image: Inactive hide details for Jonathan Ellis <jbel...@gmail. > com>]Jonathan > > Ellis <[email protected]> > > > > > > > > *Jonathan Ellis <[email protected]>* > > > > 06/22/2009 08:14 AM > > Please respond to > > [email protected] > > > > > > To > > > > [email protected] > > cc > > > > > > Subject > > > > VOTE: Cassandra 0.3.0 release > > > > It's been two weeks since the last code change on the 0.3 branch and > > several days since RC2 release with no new bug reports. > > > > I move that we release RC2 as 0.3.0 official. > > > > svn tag: > > https://svn.apache. > org/repos/asf/incubator/cassandra/tags/cassandra-0.3.0-rc2/ > > > > binary build: > > http://people.apache.org/~jbellis/cassandra/cassandra-0.3.0-rc2.tar.gz< > http://people.apache.org/%7Ejbellis/cassandra/cassandra-0.3.0-rc2.tar.gz> > > > > Voting will run for 3 days. > > > > +1 from me. > > > > -Jonathan > > > >
