Accumulo binding errors during cleanup

[busbey]

While running through RC3 for #266 for Accumulo, my workload A load got errors during cleanup for several threads. All looked like one of the two following:

com.yahoo.ycsb.DBException: org.apache.accumulo.core.client.MutationsRejectedException: # constraint violations : 0  security codes: {}  # server errors 0 # exceptions 1
        at com.yahoo.ycsb.db.AccumuloClient.cleanup(AccumuloClient.java:105)
        at com.yahoo.ycsb.DBWrapper.cleanup(DBWrapper.java:74)
        at com.yahoo.ycsb.ClientThread.run(Client.java:273)
Caused by: org.apache.accumulo.core.client.MutationsRejectedException: # constraint violations : 0  security codes: {}  # server errors 0 # exceptions 1
        at org.apache.accumulo.core.client.impl.TabletServerBatchWriter.checkForFailures(TabletServerBatchWriter.java:537)
        at org.apache.accumulo.core.client.impl.TabletServerBatchWriter.close(TabletServerBatchWriter.java:354)
        at org.apache.accumulo.core.client.impl.BatchWriterImpl.close(BatchWriterImpl.java:54)
        at com.yahoo.ycsb.db.AccumuloClient.cleanup(AccumuloClient.java:102)
        ... 2 more
Caused by: org.apache.accumulo.core.client.impl.ThriftTransportPool$TransportPoolShutdownException
        at org.apache.accumulo.core.client.impl.ThriftTransportPool.getCache(ThriftTransportPool.java:656)
        at org.apache.accumulo.core.client.impl.ThriftTransportPool.returnTransport(ThriftTransportPool.java:526)
        at org.apache.accumulo.core.util.ThriftUtil.returnClient(ThriftUtil.java:118)
        at org.apache.accumulo.core.client.impl.TabletServerBatchWriter$MutationWriter.sendMutationsToTabletServer(TabletServerBatchWriter.java:930)
        at org.apache.accumulo.core.client.impl.TabletServerBatchWriter$MutationWriter.access$1600(TabletServerBatchWriter.java:616)
        at org.apache.accumulo.core.client.impl.TabletServerBatchWriter$MutationWriter$SendTask.send(TabletServerBatchWriter.java:801)
        at org.apache.accumulo.core.client.impl.TabletServerBatchWriter$MutationWriter$SendTask.run(TabletServerBatchWriter.java:765)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at org.apache.accumulo.trace.instrument.TraceRunnable.run(TraceRunnable.java:47)
        at org.apache.accumulo.core.util.LoggingRunnable.run(LoggingRunnable.java:34)
        at java.lang.Thread.run(Thread.java:745)

com.yahoo.ycsb.DBException: org.apache.accumulo.core.client.MutationsRejectedException: # constraint violations : 0  security codes: {}  # server errors 0 # exceptions 2
        at com.yahoo.ycsb.db.AccumuloClient.cleanup(AccumuloClient.java:105)
        at com.yahoo.ycsb.DBWrapper.cleanup(DBWrapper.java:74)
        at com.yahoo.ycsb.ClientThread.run(Client.java:273)
Caused by: org.apache.accumulo.core.client.MutationsRejectedException: # constraint violations : 0  security codes: {}  # server errors 0 # exceptions 2
        at org.apache.accumulo.core.client.impl.TabletServerBatchWriter.checkForFailures(TabletServerBatchWriter.java:537)
        at org.apache.accumulo.core.client.impl.TabletServerBatchWriter.close(TabletServerBatchWriter.java:354)
        at org.apache.accumulo.core.client.impl.BatchWriterImpl.close(BatchWriterImpl.java:54)
        at com.yahoo.ycsb.db.AccumuloClient.cleanup(AccumuloClient.java:102)
        ... 2 more
Caused by: org.apache.accumulo.core.client.impl.ThriftTransportPool$TransportPoolShutdownException
        at org.apache.accumulo.core.client.impl.ThriftTransportPool.getCache(ThriftTransportPool.java:656)
        at org.apache.accumulo.core.client.impl.ThriftTransportPool.getTransport(ThriftTransportPool.java:403)
        at org.apache.accumulo.core.client.impl.ThriftTransportPool.getTransport(ThriftTransportPool.java:397)
        at org.apache.accumulo.core.util.ThriftUtil.getClient(ThriftUtil.java:106)
        at org.apache.accumulo.core.util.ThriftUtil.getTServerClient(ThriftUtil.java:123)
        at org.apache.accumulo.core.client.impl.TabletServerBatchWriter$MutationWriter.sendMutationsToTabletServer(TabletServerBatchWriter.java:861)
        at org.apache.accumulo.core.client.impl.TabletServerBatchWriter$MutationWriter.access$1600(TabletServerBatchWriter.java:616)
        at org.apache.accumulo.core.client.impl.TabletServerBatchWriter$MutationWriter$SendTask.send(TabletServerBatchWriter.java:801)
        at org.apache.accumulo.core.client.impl.TabletServerBatchWriter$MutationWriter$SendTask.run(TabletServerBatchWriter.java:765)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at org.apache.accumulo.trace.instrument.TraceRunnable.run(TraceRunnable.java:47)
        at org.apache.accumulo.core.util.LoggingRunnable.run(LoggingRunnable.java:34)
        at java.lang.Thread.run(Thread.java:745)

We should confirm that we're properly handling clean up.