I think as you, but this is not true, there are not any permissions issue. And as i said before, cassandra try to create directory for snapshort that already exists
2012/5/19 Jonathan Ellis <jbel...@gmail.com>: > Sounds like you have a permissions problem. Cassandra creates a > subdirectory for each snapshot. > > On Thu, May 17, 2012 at 4:57 AM, ruslan usifov <ruslan.usi...@gmail.com> > wrote: >> Hello >> >> I have follow situation on our test server: >> >> from cassandra-cli i try to use >> >> truncate purchase_history; >> >> 3 times i got: >> >> [default@township_6waves] truncate purchase_history; >> null >> UnavailableException() >> at >> org.apache.cassandra.thrift.Cassandra$truncate_result.read(Cassandra.java:20212) >> at >> org.apache.cassandra.thrift.Cassandra$Client.recv_truncate(Cassandra.java:1077) >> at >> org.apache.cassandra.thrift.Cassandra$Client.truncate(Cassandra.java:1052) >> at >> org.apache.cassandra.cli.CliClient.executeTruncate(CliClient.java:1445) >> at >> org.apache.cassandra.cli.CliClient.executeCLIStatement(CliClient.java:272) >> at >> org.apache.cassandra.cli.CliMain.processStatementInteractive(CliMain.java:220) >> at org.apache.cassandra.cli.CliMain.main(CliMain.java:348) >> >> >> So this looks that truncate goes very slow and too long, than >> rpc_timeout_in_ms: 10000 (this can happens because we have very slow >> disck on test machine) >> >> But in in cassandra system log i see follow exception: >> >> >> ERROR [MutationStage:7022] 2012-05-17 12:19:14,356 >> AbstractCassandraDaemon.java (line 139) Fatal exception in thread >> Thread[MutationStage:7022,5,main] >> java.io.IOError: java.io.IOException: unable to mkdirs >> /home/cassandra/1.0.0/data/township_6waves/snapshots/1337242754356-purchase_history >> at >> org.apache.cassandra.db.ColumnFamilyStore.snapshotWithoutFlush(ColumnFamilyStore.java:1433) >> at >> org.apache.cassandra.db.ColumnFamilyStore.snapshot(ColumnFamilyStore.java:1462) >> at >> org.apache.cassandra.db.ColumnFamilyStore.truncate(ColumnFamilyStore.java:1657) >> at >> org.apache.cassandra.db.TruncateVerbHandler.doVerb(TruncateVerbHandler.java:50) >> at >> org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:59) >> at >> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) >> at >> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) >> at java.lang.Thread.run(Thread.java:662) >> Caused by: java.io.IOException: unable to mkdirs >> /home/cassandra/1.0.0/data/township_6waves/snapshots/1337242754356-purchase_history >> at >> org.apache.cassandra.io.util.FileUtils.createDirectory(FileUtils.java:140) >> at >> org.apache.cassandra.io.util.FileUtils.createDirectory(FileUtils.java:131) >> at >> org.apache.cassandra.db.ColumnFamilyStore.snapshotWithoutFlush(ColumnFamilyStore.java:1409) >> ... 7 more >> >> >> Also i see that in snapshort dir already exists >> 1337242754356-purchase_history directory, so i think that snapshort >> names that generate cassandra not uniquely. >> >> PS: We use cassandra 1.0.10 on Ubuntu 10.0.4-LTS > > > > -- > Jonathan Ellis > Project Chair, Apache Cassandra > co-founder of DataStax, the source for professional Cassandra support > http://www.datastax.com
