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From Lee Parker <...@socialagency.com>
Subject Re: error during snapshot
Date Tue, 27 Apr 2010 14:16:44 GMT
Can anyone help with this?  It is preventing me from getting backups of our
cluster.

Lee Parker
On Mon, Apr 26, 2010 at 10:02 PM, Lee Parker <lee@socialagency.com> wrote:

> I was attempting to get a snapshot on our cassandra nodes.  I get the
> following error every time I run nodetool ... snapshot.
>
> Exception in thread "main" java.io.IOException: Cannot run program "ln":
> java.io.IOException: error=12, Cannot allocate memory
>  at java.lang.ProcessBuilder.start(ProcessBuilder.java:459)
> at
> org.apache.cassandra.io.util.FileUtils.createHardLink(FileUtils.java:221)
>  at
> org.apache.cassandra.db.ColumnFamilyStore.snapshot(ColumnFamilyStore.java:1060)
> at org.apache.cassandra.db.Table.snapshot(Table.java:256)
>  at
> org.apache.cassandra.service.StorageService.takeAllSnapshot(StorageService.java:1005)
> 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:1426)
> at
> javax.management.remote.rmi.RMIConnectionImpl.access$200(RMIConnectionImpl.java:72)
>  at
> javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1264)
> at
> javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1359)
>  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:305)
>  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:619)
> Caused by: java.io.IOException: java.io.IOException: error=12, Cannot
> allocate memory
> at java.lang.UNIXProcess.<init>(UNIXProcess.java:148)
>  at java.lang.ProcessImpl.start(ProcessImpl.java:65)
> at java.lang.ProcessBuilder.start(ProcessBuilder.java:452)
>  ... 34 more
>
> The nodes are both Amazon EC2 Large instances with 7.5G RAM (6 allocated
> for Java heap) with two cores and only 70G of data in casssandra.  They have
> plenty of available RAM and HD space.  Has anyone else run into this error?
>
> Lee Parker
>

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