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From Jason Horman <>
Subject Cassandra lockup (0.6.5) on bulk write
Date Tue, 05 Oct 2010 18:28:40 GMT
We are experiencing some random hangs while importing data into
Cassandra 0.6.5. The client stack dump is below. We are using Java
Pelops with Thrift r917130. The hang seems random, sometimes millions
of records in, sometimes just a few thousand. It sort of smells like
the JIRA

Has any one else experienced this? Any advice?

Here is a dump from nodetool

Address       Status     Load          Range
           Ring       43.41 GB
25274261893111669883290654807978388961     |<--|         29.38 GB
34662916595519283353151730886201323030     |   ^         19.83 GB
45387569059876439228162547977665761954     v   |         23.59 GB
105389616365686887162471812716889564402    |   ^   Up         33.16 GB
148562884084359545011181864444489491335    |-->|

Here is the stack

"RMI TCP Connection(4)-" daemon prio=10
tid=0x00002aaac0194000 nid=0x53b3 runnable [0x000000004b7dc000]
   java.lang.Thread.State: RUNNABLE
at Method)
- locked <0x000000074d23e978> (a
at org.apache.thrift.transport.TTransport.readAll(
at org.apache.thrift.transport.TFramedTransport.readFrame(
at org.apache.thrift.transport.TTransport.readAll(
at org.apache.thrift.protocol.TBinaryProtocol.readAll(
at org.apache.thrift.protocol.TBinaryProtocol.readI32(
at org.apache.thrift.protocol.TBinaryProtocol.readMessageBegin(
at org.apache.cassandra.thrift.Cassandra$Client.recv_batch_mutate(
at org.apache.cassandra.thrift.Cassandra$Client.batch_mutate(
at org.wyki.cassandra.pelops.Mutator$1.execute(

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