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From Eric Hauser <ewhau...@gmail.com>
Subject Re: error during snapshot
Date Tue, 27 Apr 2010 14:49:31 GMT
Have you read this?

http://forums.sun.com/thread.jspa?messageID=9734530

<http://forums.sun.com/thread.jspa?messageID=9734530>I don't think EC2
instances have any swap.


On Tue, Apr 27, 2010 at 10:16 AM, Lee Parker <lee@socialagency.com> wrote:

> 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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