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https://issues.apache.org/jira/browse/CASSANDRA-4857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13868028#comment-13868028
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Christopher J. Bottaro commented on CASSANDRA-4857:
---------------------------------------------------
A few questions about implementing the workaround...
The only way to do the flush is via nodetool or JMX? Cannot be done via CQL or
client API?
"nodetool flush my_keyspace" needs to be run on every node in the cluster, like
so?
for host in cassandra_hosts
nodetool -h $host flush my_keyspace
Does "nodetool flush" block until it's done? If not, how can I tell when the
flushing is done and it's ok to proceed? Btw, looking at the logs during a
flush, it says "Enqueuing flush" which indicates asynchronous.
When you say "mutations", that just means "writes"? We can't have anything
writing to the keyspace between the flush and drop?
Sorry for asking here, I tried the mailing list and IRC first, but to no avail.
Thank you.
> FileNotFoundException after create-drop-create keyspace
> -------------------------------------------------------
>
> Key: CASSANDRA-4857
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4857
> Project: Cassandra
> Issue Type: Bug
> Environment: Cassandra trunk (565c576)
> Reporter: Tyler Patterson
> Assignee: Pavel Yaskevich
> Attachments: system.log
>
>
> {code}
> INFO [CompactionExecutor:28] 2012-10-24 14:32:22,756 CompactionTask.java
> (line 116) Compacting
> [SSTableReader(path='/var/lib/cassandra/data/Twissandra/Tweet/Twissandra-Tweet-ia-1-Data.db'),
>
> SSTableReader(path='/var/lib/cassandra/data/Twissandra/Tweet/Twissandra-Tweet-ia-6-Data.db'),
>
> SSTableReader(path='/var/lib/cassandra/data/Twissandra/Tweet/Twissandra-Tweet-ia-4-Data.db'),
>
> SSTableReader(path='/var/lib/cassandra/data/Twissandra/Tweet/Twissandra-Tweet-ia-3-Data.db'),
>
> SSTableReader(path='/var/lib/cassandra/data/Twissandra/Tweet/Twissandra-Tweet-ia-2-Data.db')]
> ERROR [CompactionExecutor:28] 2012-10-24 14:32:22,758 CassandraDaemon.java
> (line 132) Exception in thread Thread[CompactionExecutor:28,1,main]
> java.lang.RuntimeException: java.io.FileNotFoundException:
> /var/lib/cassandra/data/Twissandra/Tweet/Twissandra-Tweet-ia-1-Data.db (No
> such file or directory)
> at
> org.apache.cassandra.io.compress.CompressedRandomAccessReader.open(CompressedRandomAccessReader.java:51)
> at
> org.apache.cassandra.io.sstable.SSTableReader.openDataReader(SSTableReader.java:1094)
> at
> org.apache.cassandra.io.sstable.SSTableScanner.<init>(SSTableScanner.java:51)
> at
> org.apache.cassandra.io.sstable.SSTableReader.getDirectScanner(SSTableReader.java:937)
> at
> org.apache.cassandra.io.sstable.SSTableReader.getDirectScanner(SSTableReader.java:949)
> at
> org.apache.cassandra.db.compaction.AbstractCompactionStrategy.getScanners(AbstractCompactionStrategy.java:127)
> at
> org.apache.cassandra.db.compaction.AbstractCompactionStrategy.getScanners(AbstractCompactionStrategy.java:133)
> at
> org.apache.cassandra.db.compaction.CompactionTask.runWith(CompactionTask.java:128)
> 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.execute(CompactionTask.java:69)
> at
> org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionTask.run(CompactionManager.java:179)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:680)
> Caused by: java.io.FileNotFoundException:
> /var/lib/cassandra/data/Twissandra/Tweet/Twissandra-Tweet-ia-1-Data.db (No
> such file or directory)
> at java.io.RandomAccessFile.open(Native Method)
> at java.io.RandomAccessFile.<init>(RandomAccessFile.java:216)
> at
> org.apache.cassandra.io.util.RandomAccessReader.<init>(RandomAccessReader.java:64)
> at
> org.apache.cassandra.io.compress.CompressedRandomAccessReader.<init>(CompressedRandomAccessReader.java:70)
> at
> org.apache.cassandra.io.compress.CompressedRandomAccessReader.open(CompressedRandomAccessReader.java:47)
> ... 17 more
> {code}
> This error has been happening consistently using a modified version of the
> twissandra project. We have a script that loads in a bunch of tweet data. The
> error happens when I drop the keyspace, then recreate it and the
> columnfamilies, and rerun the script to load the data again.
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