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java.lang.AssertionError: null at org.apache.cassandra.io.compress.CompressionMetadata$Chunk.<init>(CompressionMetadata.java:475)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.io.compress.CompressionMetadata.chunkFor(CompressionMetadata.java:240)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.io.util.MmappedRegions.updateState(MmappedRegions.java:158)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.io.util.MmappedRegions.<init>(MmappedRegions.java:73)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.io.util.MmappedRegions.<init>(MmappedRegions.java:61)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.io.util.MmappedRegions.map(MmappedRegions.java:99)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.io.util.CompressedSegmentedFile.<init>(CompressedSegmentedFile.java:44)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.io.util.CompressedSegmentedFile$Builder.complete(CompressedSegmentedFile.java:135)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.io.util.SegmentedFile$Builder.complete(SegmentedFile.java:181)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.io.util.SegmentedFile$Builder.buildData(SegmentedFile.java:192)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.io.sstable.format.big.BigTableWriter.openEarly(BigTableWriter.java:271)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.io.sstable.SSTableRewriter.maybeReopenEarly(SSTableRewriter.java:182)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.io.sstable.SSTableRewriter.append(SSTableRewriter.java:134)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.db.compaction.writers.DefaultCompactionWriter.realAppend(DefaultCompactionWriter.java:65)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.db.compaction.writers.CompactionAwareWriter.append(CompactionAwareWriter.java:141)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.db.compaction.CompactionTask.runMayThrow(CompactionTask.java:187)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.db.compaction.CompactionTask.executeInternal(CompactionTask.java:82)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.db.compaction.AbstractCompactionTask.execute(AbstractCompactionTask.java:60)[apache-cassandra-3.7.jar:3.7] at org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionCandidate.run(CompactionManager.java:264)[apache-cassandra-3.7.jar:3.7] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)[na:1.8.0_101] at java.util.concurrent.FutureTask.run(FutureTask.java:266)[na:1.8.0_101] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[na:1.8.0_101] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[na:1.8.0_101] at java.lang.Thread.run(Thread.java:745)[na:1.8.0_101]