Hi, I've been changing a benchmarking tool (YCSB) to vary the number of clients throughout a workload execution and, for some reason, I believe Cassandra is facing some problems to handle the variation (both up and down) on the number of connections. Each client has a connection and clients are added or removed during execution. For some reason, after some (variable) time, I get the following exception, using the original Cassandra client implemented by YCSB, that works for a constant number of clients. Is there any reason or known issue to explain why cassandra does not handle properly the number of connection and gives broken pipe? I'm supposing this can be a Cassandra problem, but feel free to let me know if you think I'm wrong. Thanks in advance.
*Cassandra version:* 1.1.5 *Some property values:* - rpc_keepalive: true - rpc_min_threads: 16 - rpc_max_threads: 2048 *Exception:* *Changing clients from 192 to 240* *org.apache.thrift.transport.TTransportException: java.net.SocketException: Broken pipe* *org.apache.thrift.transport.TTransportException: java.net.SocketException: Broken pipe* * at org.apache.thrift.transport.TIOStreamTransport.flush(TIOStreamTransport.java:161) * * at org.apache.thrift.transport.TFramedTransport.flush(TFramedTransport.java:158) * * at org.apache.cassandra.thrift.Cassandra$Client.send_set_keyspace(Cassandra.java:436) * * at org.apache.cassandra.thrift.Cassandra$Client.set_keyspace(Cassandra.java:425) * * at com.yahoo.ycsb.db.CassandraClient10.scan(CassandraClient10.java:314)* * at com.yahoo.ycsb.DBWrapper.scan(DBWrapper.java:106)* * at com.yahoo.ycsb.workloads.CoreWorkload.doTransactionScan(CoreWorkload.java:530) * * at com.yahoo.ycsb.workloads.CoreWorkload.doTransaction(CoreWorkload.java:431)* * at com.yahoo.ycsb.ClientThread.run(ClientThread.java:105)* Att. *Rodrigo Felix de Almeida* LSBD - Universidade Federal do CearĂ¡ Project Manager MBA, CSM, CSPO, SCJP