It's unfortunate you dont have a better stack trace to know what's actually going on here. 3.7 is pretty old, I'd be inclined to upgrade to the latest 3.11 branch to hope that you either get a better stack or an outright fix, but that stack doesn't ring any bells for me.
On Mon, Sep 9, 2019 at 10:20 AM Leena Ghatpande <lghatpa...@hotmail.com> wrote: > We are on Cassandra 3.7 and have a 8 node cluster , 2DC, with 4 nodes in > each DC. RF=3 > > The below Compaction Error message is being logged to the system.log > exactly every Minute. > > ERROR [CompactionExecutor:5751] 2019-06-09 03:24:50,585 > CassandraDaemon.java:217 - Exception in thread > Thread[CompactionExecutor:5751,1,main] > java.lang.NullPointerException: null > > ERROR [CompactionExecutor:5751] 2019-06-09 03:25:50,592 > CassandraDaemon.java:217 - Exception in thread > Thread[CompactionExecutor:5751,1,main] > java.lang.NullPointerException: null > > ERROR [CompactionExecutor:5753] 2019-06-09 03:26:50,709 > CassandraDaemon.java:217 - Exception in thread > Thread[CompactionExecutor:5753,1,main] > java.lang.NullPointerException: null > > ERROR [CompactionExecutor:5753] 2019-06-09 03:27:50,734 > CassandraDaemon.java:217 - Exception in thread > Thread[CompactionExecutor:5753,1,main] > > We have been seeing this error for some time now. But this error is > showing only on 5 out of the 8 nodes. > > It does not provide any more details of the error even if we enable the > Debug Mode. I am not sure what table that this error is related to either. > We run repairs with -pr option every alternate day and they have been > running successfully. > > nodetool compactionstats shows 0 pending tasks. > pending tasks: 0 > > We are trying to figure out what this error indicates and if its a concern > that we need to address. > > Any other suggestions also will be greatly appreciated. > > >
