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From: Jonathan Ellis <jbellis@gmail.com>
Date: Tue, 17 Apr 2012 22:01:30 -0500
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 <CALdd-zgMfg1tXw1nr+7WNTWXwJ5iBwXW0WkWnEoDtGLS2v4udw@mail.gmail.com>
Subject: Re: java.nio.BufferOverflowException from cassandra server
To: user@cassandra.apache.org
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If I were to take a wild guess, it would be that you're using a single
Thrift connection in multiple threads, which isn't supported.

On Mon, Apr 16, 2012 at 6:43 PM, Aniket Chakrabarti
<chakraba@cse.ohio-state.edu> wrote:
> Hi,
>
> I have set up a 4 node cassandra cluster. I am using the Thrift C++ API t=
o
> write a simple C++ application with creates a 50% READ 50% WRITE requests=
.
> Every time near about a thousand request mark, I am getting the following
> exception and my connection is broken:
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D
> ERROR 17:30:27,647 Error occurred during processing of message.
> java.nio.BufferOverflowException
> =A0 =A0 =A0 =A0at java.nio.charset.CoderResult.throwException(Unknown Sou=
rce)
> =A0 =A0 =A0 =A0at java.lang.StringCoding$StringEncoder.encode(Unknown Sou=
rce)
> =A0 =A0 =A0 =A0at java.lang.StringCoding.encode(Unknown Source)
> =A0 =A0 =A0 =A0at java.lang.String.getBytes(Unknown Source)
> =A0 =A0 =A0 =A0at
> org.apache.thrift.protocol.TBinaryProtocol.writeString(TBinaryProtocol.ja=
va:185)
> =A0 =A0 =A0 =A0at
> org.apache.thrift.protocol.TBinaryProtocol.writeMessageBegin(TBinaryProto=
col.java:92)
> =A0 =A0 =A0 =A0at
> org.apache.cassandra.thrift.Cassandra$Processor$insert.process(Cassandra.=
java:3302)
> =A0 =A0 =A0 =A0at
> org.apache.cassandra.thrift.Cassandra$Processor.process(Cassandra.java:28=
89)
> =A0 =A0 =A0 =A0at
> org.apache.cassandra.thrift.CustomTThreadPoolServer$WorkerProcess.run(Cus=
tomTThreadPoolServer.java:187)
> =A0 =A0 =A0 =A0at java.util.concurrent.ThreadPoolExecutor.runWorker(Unkno=
wn Source)
> =A0 =A0 =A0 =A0at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unkn=
own Source)
> =A0 =A0 =A0 =A0at java.lang.Thread.run(Unknown Source)
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D
> Some info about the config I am using:
> - It is a 4 node cluster with only 1 seed.
> -The consistency level is also set to ONE.
> -The max heap size and new heap size is set to 4G and 800M(I tried withou=
t
> setting them as well)
> -Java is run in the interpreted mode(-Xint)
> -I'm using user mode linux
>
> Any pointers to what I might be doing wrong will be very helpful.
>
> Thanks in advance,
> Aniket


--=20
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com