Step 0: don't use raw Thrift, use one of the clients from http://wiki.apache.org/cassandra/ClientOptions06
On Thu, Nov 18, 2010 at 10:49 AM, Nick Reeves <n...@realvnc.com> wrote: > I was trying to get Cassandra 0.6.8 (latest stable release) going for the > first time and my attempts at getting the example code to run caused > Cassandra to die with out a JavaMemoryError just by connecting cassandra-cli > to cassandra. > > java.lang.OutOfMemoryError: Java heap space > at > org.apache.thrift.protocol.TBinaryProtocol.readStringBody(TBinaryProtocol.java:296) > at > org.apache.thrift.protocol.TBinaryProtocol.readMessageBegin(TBinaryProtocol.java:203) > at > org.apache.cassandra.thrift.Cassandra$Processor.process(Cassandra.java:1154) > at > org.apache.cassandra.thrift.CustomTThreadPoolServer$WorkerProcess.run(CustomTThreadPoolServer.java:167) > at > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) > at java.lang.Thread.run(Thread.java:662) > > Looking at the thrift code it is allocating arrays based on lengths read of > the wire, without adequate validation of the length. This allows client > errors to crash the server :( > > The steps were: > > 1) I was trying to use the Java sample client code in > > http://wiki.apache.org/cassandra/ThriftExamples > > I got past the pains of thrift install, and the fact that the sample code is > out of date. Constructor signatures have changed in the code thrift r917130 > (as used in 0.6.8) generates. > > 2) I then ran into the problem that the sample client uses framed transport, > but cassandra default storage-conf.xml uses unframed transport. This didn't > give a clean error, but just cause the client to block for ever :( > > I changed the cassandra storage-conf.xml to use framed transport to resolve > this. > > 3) Using the cassandra-cli to connect to cassandra produced the error above. > This is presumably because the client was using unframed transport and the > server wasn't. That said the server should have enough validation to avoid > crashin because of bad clients. > > I plan to persevere, but I thought I'd let you all know as these sort of > problems could put off a lot of newcomers. > > Nick Reeves > > > -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of Riptano, the source for professional Cassandra support http://riptano.com
