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From Alain RODRIGUEZ <arodr...@gmail.com>
Subject Re: Snapshot failing on JSON files in 1.1.0
Date Mon, 28 May 2012 09:27:28 GMT
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 <jbellis@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 <bfernandezsa@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 <driftx@gmail.com> wrote:
>>>
>>> Probably https://issues.apache.org/jira/browse/CASSANDRA-4230
>>>
>>> On Tue, May 15, 2012 at 4:08 PM, Bryan Fernandez <bfernandezsa@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

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