I have the same error with the last Datastax AMI (1.0.9). Is that the same bug ?
Requested snapshot for: cassa_teads Exception in thread "main" java.io.IOError: java.io.IOException: Unable to create hard link from /raid0/cassandra/data/cassa_teads/stats_product-hc-233-Index.db to /raid0/cassandra/data/cassa_teads/snapshots/20120528/stats_product-hc-233-Index.db (errno 0) 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.Table.snapshot(Table.java:210) at org.apache.cassandra.service.StorageService.takeSnapshot(StorageService.java:1710) 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.GeneratedMethodAccessor50.invoke(Unknown Source) 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 /raid0/cassandra/data/cassa_teads/stats_product-hc-233-Index.db to /raid0/cassandra/data/cassa_teads/snapshots/20120528/stats_product-hc-233-Index.db (errno 0) at org.apache.cassandra.utils.CLibrary.createHardLink(CLibrary.java:158) at org.apache.cassandra.io.sstable.SSTableReader.createLinks(SSTableReader.java:857) at org.apache.cassandra.db.ColumnFamilyStore.snapshotWithoutFlush(ColumnFamilyStore.java:1412) ... 32 more Can we do a snapshot manually (like flushing and after copying all the file into the snapshot folder) ? Alain 2012/5/19 Jonathan Ellis <jbel...@gmail.com>: > When these bugs are fixed: > https://issues.apache.org/jira/secure/IssueNavigator.jspa?reset=true&jqlQuery=project+%3D+CASSANDRA+AND+fixVersion+%3D+%221.1.1%22+AND+resolution+%3D+Unresolved+ORDER+BY+due+ASC%2C+priority+DESC%2C+created+ASC&mode=hide > > On Wed, May 16, 2012 at 6:35 PM, Bryan Fernandez <bfernande...@gmail.com> > wrote: >> Does anyone know when 1.1.1 will be released? >> >> Thanks. >> >> On Tue, May 15, 2012 at 5:40 PM, Brandon Williams <dri...@gmail.com> wrote: >>> >>> 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 >>> > >>> > >>> > >>> > >> >> > > > > -- > Jonathan Ellis > Project Chair, Apache Cassandra > co-founder of DataStax, the source for professional Cassandra support > http://www.datastax.com