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From "Jason Kania (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-11018) Drop column in results in corrupted table or tables state (reversible)
Date Fri, 15 Jan 2016 04:15:39 GMT
Jason Kania created CASSANDRA-11018:
---------------------------------------

             Summary: Drop column in results in corrupted table or tables state (reversible)
                 Key: CASSANDRA-11018
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11018
             Project: Cassandra
          Issue Type: Bug
          Components: CQL
         Environment: Debian 3.16.7
            Reporter: Jason Kania
            Priority: Minor


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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