Details
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Bug
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Status: Resolved
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Low
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Resolution: Fixed
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None
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Debian 3.16.7
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Low
Description
After dropping a column from a table, that table is no longer accessible from various commands.
Initial command in cqlsh;
alter table "sensorUnit" drop "lastCouplingCheckTime";
no errors were reported:
Subsequently, the following commands fail as follows:
> nodetool compact root@marble:/var/log/cassandra# nodetool compact error: Unknown column lastCouplingCheckTime in table powermon.sensorUnit -- StackTrace -- java.lang.AssertionError: Unknown column lastCouplingCheckTime in table powermon.sensorUnit at org.apache.cassandra.db.LegacyLayout.readLegacyAtom(LegacyLayout.java:964) at org.apache.cassandra.db.UnfilteredDeserializer$OldFormatDeserializer$AtomIterator.readAtom(UnfilteredDeserializer.java:520) at org.apache.cassandra.db.UnfilteredDeserializer$OldFormatDeserializer$AtomIterator.hasNext(UnfilteredDeserializer.java:503) at org.apache.cassandra.db.UnfilteredDeserializer$OldFormatDeserializer$UnfilteredIterator.readRow(UnfilteredDeserializer.java:446) at org.apache.cassandra.db.UnfilteredDeserializer$OldFormatDeserializer$UnfilteredIterator.hasNext(UnfilteredDeserializer.java:422) 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$1.reduce(UnfilteredPartitionIterators.java:100) at org.apache.cassandra.utils.MergeIterator$OneToOne.computeNext(MergeIterator.java:442) 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)
Also I get the following from cqlsh commands:
cqlsh:sensorTrack> select * from "sensorUnit"; Traceback (most recent call last): File "/usr/bin/cqlsh.py", line 1258, in perform_simple_statement result = future.result() File "/usr/share/cassandra/lib/cassandra-driver-internal-only-3.0.0-6af642d.zip/cassandra-driver-3.0.0-6af642d/cassandra/cluster.py", line 3122, in result raise self._final_exception ReadFailure: code=1300 [Replica(s) failed to execute read] message="Operation failed - received 0 responses and 1 failures" info={'failures': 1, 'received_responses': 0, 'required_responses': 1, 'consistency': 'ONE'}
However, after I readded the table, access to the database was restored.
alter table "sensorUnit" add "lastCouplingCheckTime"
I was not able to reproduce as subsequent attempts to alter worked properly, but the problem occurred on two tables that were altered at the same time so there may be a need to ensure a drop completes entirely when it is performed.
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