Greetings, Recently I've started to see the an assertion (traceback follows at the end of the message) causing exceptions in a 3-node Cassandra 3.5 cluster (running on Ubuntu 14.04 on Amazon EC2). It seems to happen in all nodes. Repairs run fine without indicating any errors.
I can't seem to find any information about it from someone else or any bug reports. Should I bother running an SSTable scrub? Is it a known issue that is fixed in subsequent versions? Thanks in advance, Daniel --- WARN [SharedPool-Worker-1] 2017-03-16 18:54:35,587 AbstractLocalAwareExecutorService.java:169 - Uncaught exception on thread Thread[SharedPool-Worker-1,5,main]: {} java.lang.AssertionError: null at org.apache.cassandra.db.rows.UnfilteredRowIterators.concat(UnfilteredRowIterators.java:157) ~[apache-cassandra-3.5.jar:3.5] at org.apache.cassandra.db.SinglePartitionReadCommand.getThroughCache(SinglePartitionReadCommand.java:420) ~[apache-cassandra-3.5.jar:3.5] at org.apache.cassandra.db.SinglePartitionReadCommand.queryStorage(SinglePartitionReadCommand.java:324) ~[apache-cassandra-3.5.jar:3.5] at org.apache.cassandra.db.ReadCommand.executeLocally(ReadCommand.java:366) ~[apache-cassandra-3.5.jar:3.5] at org.apache.cassandra.service.StorageProxy$LocalReadRunnable.runMayThrow(StorageProxy.java:1797) ~[apache-cassandra-3.5.jar:3.5] at org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:2466) ~[apache-cassandra-3.5.jar:3.5] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_111] at org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:164) ~[apache-cassandra-3.5.jar:3.5] at org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$LocalSessionFutureTask.run(AbstractLocalAwareExecutorService.java:136) [apache-cassandra-3.5.jar:3.5] at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105) [apache-cassandra-3.5.jar:3.5] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_111] -- *Daniel Miranda* DevOps Engineering Intern (11) 991959845 www.cobli.co