[ome-users] OMERO crash: Too many open files

[Josh Moore]

On Jan 27, 2012, at 1:21 PM, Mark Henshall wrote:

> doing 'cat /proc/sys/fs/file-max' gives 596753
> doing 'ulimit -Hn' as omero gives 1024

Thanks, Mark. That's definitely on the low-side for the server process. We'll add specific suggestions to the regular install instructions. On the flip-side, it more quickly shows programming issues like not closing services. :)

Cheers,
~Josh.


> Quoting Josh Moore <josh at glencoesoftware.com>:
> 
>> 
>> On Jan 26, 2012, at 6:41 PM, Alexander Tournier wrote:
>> 
>>> Hi there,
>>> 
>>> I've been using OMERO quite heavily and ... it crashed. ie I can't login to OMERO anymore although others seem to be able to.
>>> The most interesting is the error message below.
>>> I was saving quite a lot of data and I realise that I didn't close the rawPixelStore which might explain the error.
>>> The problem I have at the moment is that it doesn't seem to be rectifying itself on its own.
>>> Is there a time delay by which the open files are forcefully closed and services resumed or do we need to reboot OMERO?
>> 
>> The services won't be closed until the session is closed. If you are somehow keeping that alive (e.g. by doing other activities) _and_ not closing your services, then you'll run out of file handles. Do you know how many are configured for your server?
>> 
>> ~Josh
>> 
>>> Thanks,
>>> Alexander
>>> 
>>> 
>>> Error using omero.client/createSession
>>> Java exception occurred:
>>> Glacier2.PermissionDeniedException
>>>   reason = "Internal error. Please contact your administrator:
>>>              Wrapped Exception:
>>>              (org.springframework.ldap.CommunicationException):
>>>             uk-lri-ldco02.crwin.crnet.org:636; nested exception is
>>>             javax.naming.CommunicationException:
>>>             uk-lri-ldco02.crwin.crnet.org:636 [Root exception is
>>>             java.net.SocketException: Too many open files]"
>>>   at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>>>   at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
>>>   at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown
>>>       Source)
>>>   at java.lang.reflect.Constructor.newInstance(Unknown Source)
>>>   at java.lang.Class.newInstance0(Unknown Source)
>>>   at java.lang.Class.newInstance(Unknown Source)
>>>   at
>>>       IceInternal.BasicStream$DynamicUserExceptionFactory.createAndThrow(BasicStream.java:2243)
>>>           at IceInternal.BasicStream.throwException(BasicStream.java:1632)
>>>   at IceInternal.Outgoing.throwUserException(Outgoing.java:442)
>>>   at Glacier2._RouterDelM.createSession(_RouterDelM.java:42)
>>>   at Glacier2.RouterPrxHelper.createSession(RouterPrxHelper.java:51)
>>>   at Glacier2.RouterPrxHelper.createSession(RouterPrxHelper.java:29)
>>>   at omero.client.createSession(client.java:628)
>>>   at omero.client.createSession(client.java:567)