Probably https://issues.apache.org/jira/browse/CASSANDRA-4230
On Tue, May 15, 2012 at 4:08 PM, Bryan Fernandez <bfernande...@gmail.com> wrote: > Greetings, > > We recently upgraded from 1.0.8 to 1.1.0. Everything has been running fine > with the exception of snapshots. When attempting to snapshot any of the > nodes in our six node cluster we are seeing the following error. > > [root@cassandra-n6 blotter]# /opt/apache-cassandra-1.1.0/bin/nodetool -h > 10.20.50.58 snapshot > Requested snapshot for: all keyspaces > Exception in thread "main" java.io.IOError: java.io.IOException: Unable to > create hard link from > /var/lib/cassandra/data/blotter/twitter_users/twitter_users.json to > /var/lib/cassandra/data/blotter/twitter_users/snapshots/1337115022389/twitter_users.json > (errno 17) > at > org.apache.cassandra.db.ColumnFamilyStore.snapshotWithoutFlush(ColumnFamilyStore.java:1454) > at > org.apache.cassandra.db.ColumnFamilyStore.snapshot(ColumnFamilyStore.java:1483) > at org.apache.cassandra.db.Table.snapshot(Table.java:205) > at > org.apache.cassandra.service.StorageService.takeSnapshot(StorageService.java:1793) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at > com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:93) > at > com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:27) > at > com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:208) > at com.sun.jmx.mbeanserver.PerInterface.invoke(PerInterface.java:120) > at com.sun.jmx.mbeanserver.MBeanSupport.invoke(MBeanSupport.java:262) > at > com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:836) > at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:761) > at > javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1427) > at > javax.management.remote.rmi.RMIConnectionImpl.access$200(RMIConnectionImpl.java:72) > at > javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1265) > at > javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1360) > at > javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:788) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:303) > at sun.rmi.transport.Transport$1.run(Transport.java:159) > at java.security.AccessController.doPrivileged(Native Method) > at sun.rmi.transport.Transport.serviceCall(Transport.java:155) > at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535) > at > sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790) > at > sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649) > at > java.util.concurrent.ThreadPoolExecutor$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 create hard link from > /var/lib/cassandra/data/blotter/twitter_users/twitter_users.json to > /var/lib/cassandra/data/blotter/twitter_users/snapshots/1337115022389/twitter_users.json > (errno 17) > at org.apache.cassandra.utils.CLibrary.createHardLink(CLibrary.java:163) > at > org.apache.cassandra.db.Directories.snapshotLeveledManifest(Directories.java:343) > at > org.apache.cassandra.db.ColumnFamilyStore.snapshotWithoutFlush(ColumnFamilyStore.java:1450) > ... 33 more > > > However, an LS shows that both of these JSON files exist on the filesystem > (although slightly different sizes). > > [root@cassandra-n6 blotter]# ls -al > /var/lib/cassandra/data/blotter/twitter_users/twitter_users.json > -rw-r--r-- 1 root root 38786 May 15 20:51 > /var/lib/cassandra/data/blotter/twitter_users/twitter_users.json > > [root@cassandra-n6 blotter]# ls -al > /var/lib/cassandra/data/blotter/twitter_users/snapshots/1337115022389/twitter_users.json > -rw-r--r-- 1 root root 38778 May 15 20:50 > /var/lib/cassandra/data/blotter/twitter_users/snapshots/1337115022389/twitter_users.json > > > We are using Leveled Compaction on the twitter_users CF with I assume is > creating the JSON files. > > [root@cassandra-n6 blotter]# ls -al > /var/lib/cassandra/data/blotter/twitter_users/*.json > -rw-r--r-- 1 root root 38779 May 15 20:51 > /var/lib/cassandra/data/blotter/twitter_users/twitter_users.json > -rw-r--r-- 1 root root 38779 May 15 20:51 > /var/lib/cassandra/data/blotter/twitter_users/twitter_users-old.json > -rw-r--r-- 1 root root 1040 May 15 20:51 > /var/lib/cassandra/data/blotter/twitter_users/twitter_users.twitter_user_attributes_screenname_idx.json > -rw-r--r-- 1 root root 1046 May 15 20:50 > /var/lib/cassandra/data/blotter/twitter_users/twitter_users.twitter_user_attributes_screenname_idx-old.json > > > The other column families which are not using Leveled Compaction seem to > have their snapshots created successfully. > > Any ideas other than turning off Leveled Compaction? > > > Thanks, > > Brian > > > >
