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From "Alexander Radzin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-7358) Conflict between guava from Cassandra and CQL Driver
Date Thu, 05 Jun 2014 16:58:02 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14018964#comment-14018964
] 

Alexander Radzin commented on CASSANDRA-7358:
---------------------------------------------

Johathan, I understand your reasons. However the problem is that right now this problem blocks
upgrade of CQL driver to stable release that contains a bunch of bug fixes. 

> Conflict between guava from Cassandra and CQL Driver
> ----------------------------------------------------
>
>                 Key: CASSANDRA-7358
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7358
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Alexander Radzin
>
> The problem is that Cassandra still depends on guava 15 while CQL Driver depends on guava
16. Attempts to run both in the same process (that is typical for embedding cassandra e.g.
for unit tests) causes incompatibility problems:
> {noformat}
> java.lang.NoSuchMethodError: com.google.common.util.concurrent.RateLimiter.acquire(I)V
> 	at org.apache.cassandra.io.compress.CompressedThrottledReader.reBuffer(CompressedThrottledReader.java:40)
> 	at org.apache.cassandra.io.util.RandomAccessReader.seek(RandomAccessReader.java:280)
> 	at org.apache.cassandra.io.sstable.SSTableScanner$KeyScanningIterator.computeNext(SSTableScanner.java:262)
> 	at org.apache.cassandra.io.sstable.SSTableScanner$KeyScanningIterator.computeNext(SSTableScanner.java:203)
> 	at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)
> 	at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)
> 	at org.apache.cassandra.io.sstable.SSTableScanner.hasNext(SSTableScanner.java:183)
> 	at org.apache.cassandra.utils.MergeIterator$Candidate.advance(MergeIterator.java:144)
> 	at org.apache.cassandra.utils.MergeIterator$ManyToOne.<init>(MergeIterator.java:87)
> 	at org.apache.cassandra.utils.MergeIterator.get(MergeIterator.java:46)
> 	at org.apache.cassandra.db.compaction.CompactionIterable.iterator(CompactionIterable.java:47)
> 	at org.apache.cassandra.db.compaction.CompactionTask.runWith(CompactionTask.java:129)
> 	at org.apache.cassandra.io.util.DiskAwareRunnable.runMayThrow(DiskAwareRunnable.java:48)
> 	at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
> 	at org.apache.cassandra.db.compaction.CompactionTask.executeInternal(CompactionTask.java:60)
> 	at org.apache.cassandra.db.compaction.AbstractCompactionTask.execute(AbstractCompactionTask.java:59)
> 	at org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionTask.run(CompactionManager.java:198)
> 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 	at java.lang.Thread.run(Thread.java:744)
> {noformat}
> Method {{acquire()}} from class {{com.google.common.util.concurrent.RateLimiter}} accepts
one {{int}} parameter but its return value changed. It was {{void}} but now it is {{double}}.
As far as I understand this is the reason for attached exception.
> This problem does not allow us to upgrade CQL driver to version newer than {{2.0.0-rc2}}.



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