I got this compaction error when running 'nodetool upgradesstable -a' while upgrading from 2.1.9 to 3.0.2. According to documentation this upgrade should work.
Would upgrading to another intermediate version help? This is the line number: https://github.com/apache/cassandra/blob/cassandra-3.0.2/src/java/org/apache/cassandra/db/LegacyLayout.java#L1124 error: null -- StackTrace -- java.lang.AssertionError at org.apache.cassandra.db.LegacyLayout$CellGrouper.addCell(LegacyLayout.java:1124) at org.apache.cassandra.db.LegacyLayout$CellGrouper.addAtom(LegacyLayout.java:1099) at org.apache.cassandra.db.UnfilteredDeserializer$OldFormatDeserializer$UnfilteredIterator.readRow(UnfilteredDeserializer.java:444) at org.apache.cassandra.db.UnfilteredDeserializer$OldFormatDeserializer$UnfilteredIterator.hasNext(UnfilteredDeserializer.java:423) at org.apache.cassandra.db.UnfilteredDeserializer$OldFormatDeserializer.hasNext(UnfilteredDeserializer.java:289) at org.apache.cassandra.io.sstable.SSTableSimpleIterator$OldFormatIterator.readStaticRow(SSTableSimpleIterator.java:134) at org.apache.cassandra.io.sstable.SSTableIdentityIterator.<init>(SSTableIdentityIterator.java:57) at org.apache.cassandra.io.sstable.format.big.BigTableScanner$KeyScanningIterator$1.initializeIterator(BigTableScanner.java:329) at org.apache.cassandra.db.rows.LazilyInitializedUnfilteredRowIterator.maybeInit(LazilyInitializedUnfilteredRowIterator.java:48) at org.apache.cassandra.db.rows.LazilyInitializedUnfilteredRowIterator.isReverseOrder(LazilyInitializedUnfilteredRowIterator.java:65) at org.apache.cassandra.db.partitions.UnfilteredPartitionIterators$1.reduce(UnfilteredPartitionIterators.java:109) at org.apache.cassandra.db.partitions.UnfilteredPartitionIterators$1.reduce(UnfilteredPartitionIterators.java:100) at org.apache.cassandra.utils.MergeIterator$ManyToOne.consume(MergeIterator.java:206) at org.apache.cassandra.utils.MergeIterator$ManyToOne.computeNext(MergeIterator.java:159) at org.apache.cassandra.utils.AbstractIterator.hasNext(AbstractIterator.java:47) at org.apache.cassandra.db.partitions.UnfilteredPartitionIterators$2.hasNext(UnfilteredPartitionIterators.java:150) at org.apache.cassandra.db.transform.BasePartitions.hasNext(BasePartitions.java:72) at org.apache.cassandra.db.compaction.CompactionIterator.hasNext(CompactionIterator.java:226) at org.apache.cassandra.db.compaction.CompactionTask.runMayThrow(CompactionTask.java:177) at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28) at org.apache.cassandra.db.compaction.CompactionTask.executeInternal(CompactionTask.java:78) at org.apache.cassandra.db.compaction.AbstractCompactionTask.execute(AbstractCompactionTask.java:60) at org.apache.cassandra.db.compaction.CompactionManager$8.runMayThrow(CompactionManager.java:572) at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)
