[jira] [Created] (CASSANDRA-11293) NPE when using CQLSSTableWriter

["Will Hayworth (JIRA)" <ji...@apache.org>]

Will Hayworth created CASSANDRA-11293:
-----------------------------------------

             Summary: NPE when using CQLSSTableWriter
                 Key: CASSANDRA-11293
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11293
             Project: Cassandra
          Issue Type: Bug
         Environment: C* 3.3
            Reporter: Will Hayworth


Hi all!

I'm trying to using CQLSSTableWriter to load a bunch of historical data into my cluster and I'm getting NullPointerExceptions consistently after having written a few million rows (anywhere from 0.5 to 1.5 GB of data).

{code}
java.lang.NullPointerException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:422) at java.util.concurrent.ForkJoinTask.getThrowableException(ForkJoinTask.java:598) at java.util.concurrent.ForkJoinTask.reportException(ForkJoinTask.java:677) at java.util.concurrent.ForkJoinTask.invoke(ForkJoinTask.java:735) at java.util.stream.ForEachOps$ForEachOp.evaluateParallel(ForEachOps.java:160) at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateParallel(ForEachOps.java:174) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:233) at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418) at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:583)
 at com.atlassian.engagementengine.segmentation.helenus.Daemon.main(Daemon.java:24)

Caused by: java.lang.NullPointerException at org.apache.cassandra.db.ClusteringComparator.compare(ClusteringComparator.java:126) at org.apache.cassandra.db.ClusteringComparator.compare(ClusteringComparator.java:44) at java.util.TimSort.binarySort(TimSort.java:296) at java.util.TimSort.sort(TimSort.java:239) at java.util.Arrays.sort(Arrays.java:1512) at org.apache.cassandra.utils.btree.BTree$Builder.sort(BTree.java:1027) at org.apache.cassandra.utils.btree.BTree$Builder.autoEnforce(BTree.java:1036) at org.apache.cassandra.utils.btree.BTree$Builder.build(BTree.java:1075) at org.apache.cassandra.db.partitions.PartitionUpdate.build(PartitionUpdate.java:572) at org.apache.cassandra.db.partitions.PartitionUpdate.maybeBuild(PartitionUpdate.java:562) at org.apache.cassandra.db.partitions.PartitionUpdate.holder(PartitionUpdate.java:370) at org.apache.cassandra.db.partitions.AbstractBTreePartition.unfilteredIterator(AbstractBTreePartition.java:177) at org.apache.cassandra.db.partitions.AbstractBTreePartition.unfilteredIterator(AbstractBTreePartition.java:172) at org.apache.cassandra.io.sstable.SSTableSimpleUnsortedWriter$DiskWriter.run(SSTableSimpleUnsortedWriter.java:209)
{code}

This may be a red herring, but I started encountering this when I parallelized writes. (I wasn't aware that doing so was safe until I saw CASSANDRA-7463; I Googled in vain for a while before that.)



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