[xwiki-users] Memory Leak detected - can anything be done to rectify?
Hi, just checked through my logs and found this: SEVERE: The web application [/xwiki] created a ThreadLocal with key of type [org.apache.log4j.helpers.ThreadLocalMap] (value [org.apache.log4j.helpers.ThreadLocalMap@2ff7ac92]) and a value of type [java.util.Hashtable] (value [{url=http://wiki.optiplex-networks.com/xwiki/bin/export/XWiki/ResetPasswordRequestClass?format=xar&name=XWiki.ResetPasswordRequestClass&pages=XWiki.ResetPasswordRequestClass}]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak. it's probably the reason my Java instance is so unstable and hogging my systems swap. Can anything be done to sort it?
Hi Kaya, are you experiencing this on XWiki Enterprise 3.2? If so, this is a know issue that will be fixed in XWiki Enterprise 3.2.1 which should be out pretty soon. Guillaume On Mon, Jan 9, 2012 at 5:01 PM, Kaya Saman <kayasaman@gmail.com> wrote:
Hi,
just checked through my logs and found this:
SEVERE: The web application [/xwiki] created a ThreadLocal with key of type [org.apache.log4j.helpers.**ThreadLocalMap] (value [org.apache.log4j.helpers.**ThreadLocalMap@2ff7ac92]) and a value of type [java.util.Hashtable] (value [{url=http://wiki.optiplex-** networks.com/xwiki/bin/export/**XWiki/**ResetPasswordRequestClass?** format=xar&name=XWiki.**ResetPasswordRequestClass&**pages=XWiki.** ResetPasswordRequestClass}<http://wiki.optiplex-networks.com/xwiki/bin/export/XWiki/ResetPasswordRequestClass?format=xar&name=XWiki.ResetPasswordRequestClass&pages=XWiki.ResetPasswordRequestClass%7D>]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
it's probably the reason my Java instance is so unstable and hogging my systems swap. Can anything be done to sort it? ______________________________**_________________ users mailing list users@xwiki.org http://lists.xwiki.org/**mailman/listinfo/users<http://lists.xwiki.org/mailman/listinfo/users>
On 01/09/2012 11:01 AM, Kaya Saman wrote:
Hi,
just checked through my logs and found this:
SEVERE: The web application [/xwiki] created a ThreadLocal with key of type [org.apache.log4j.helpers.ThreadLocalMap] (value [org.apache.log4j.helpers.ThreadLocalMap@2ff7ac92]) and a value of type [java.util.Hashtable] (value [{url=http://wiki.optiplex-networks.com/xwiki/bin/export/XWiki/ResetPasswordRequestClass?format=xar&name=XWiki.ResetPasswordRequestClass&pages=XWiki.ResetPasswordRequestClass}]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
it's probably the reason my Java instance is so unstable and hogging my systems swap. Can anything be done to sort it?
That's not severe, it's only triggered when undeploying XWiki. When shutting down Tomcat, it doesn't mean anything since the JVM is going to exit anyway. The only real concern is when you redeploy the war at runtime, through the container's management interface, and Tomcat does handle that, it just reports it as a warning. -- Sergiu Dumitriu http://purl.org/net/sergiu/
On 01/09/2012 06:08 PM, Sergiu Dumitriu wrote:
On 01/09/2012 11:01 AM, Kaya Saman wrote:
Hi,
just checked through my logs and found this:
SEVERE: The web application [/xwiki] created a ThreadLocal with key of type [org.apache.log4j.helpers.ThreadLocalMap] (value [org.apache.log4j.helpers.ThreadLocalMap@2ff7ac92]) and a value of type [java.util.Hashtable] (value [{url=http://wiki.optiplex-networks.com/xwiki/bin/export/XWiki/ResetPasswordRequestClass?format=xar&name=XWiki.ResetPasswordRequestClass&pages=XWiki.ResetPasswordRequestClass}])
but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
it's probably the reason my Java instance is so unstable and hogging my systems swap. Can anything be done to sort it?
That's not severe, it's only triggered when undeploying XWiki. When shutting down Tomcat, it doesn't mean anything since the JVM is going to exit anyway. The only real concern is when you redeploy the war at runtime, through the container's management interface, and Tomcat does handle that, it just reports it as a warning.
Well for a while I've been trying to debug 'extreme' memory usage by Tomcat/Java and it seems it's a viable culprit. Not so much for my wiki site but my www which actually should have smaller footprint then my wiki since it has much less information in it or attachments. The only thing that may use more memory could be the flash video on the main page. Out of 4GB memory this is what's happened to my system: Mem: 1738M Active, 266M Inact, 1673M Wired, 25M Cache, 408M Buf, 125M Free Swap: 2327M Total, 2276M Used, 51M Free, 97% Inuse PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND 51547 www 46 44 0 3557M 993M ucond 1 9:46 0.00% java which is 64bit too..... The RES part of top has gone down but used to be round 1.6GB?? If it's not a memory leak as such then are there any performance tips that I can use that will directly lower the memory usage? I have checked out the 'performance tuning' page on the site, hence I was directly working in it for the robots.txt stuff :-) Regards, Kaya
On 01/09/2012 06:06 PM, Guillaume Lerouge wrote:
Hi Kaya,
are you experiencing this on XWiki Enterprise 3.2?
If so, this is a know issue that will be fixed in XWiki Enterprise 3.2.1 which should be out pretty soon.
Guillaume
How can I check the version?? I can't remember when I built my wiki but it was probably back in 2010 or so.......
On Mon, Jan 9, 2012 at 5:01 PM, Kaya Saman<kayasaman@gmail.com> wrote:
Hi,
just checked through my logs and found this:
SEVERE: The web application [/xwiki] created a ThreadLocal with key of type [org.apache.log4j.helpers.**ThreadLocalMap] (value [org.apache.log4j.helpers.**ThreadLocalMap@2ff7ac92]) and a value of type [java.util.Hashtable] (value [{url=http://wiki.optiplex-** networks.com/xwiki/bin/export/**XWiki/**ResetPasswordRequestClass?** format=xar&name=XWiki.**ResetPasswordRequestClass&**pages=XWiki.** ResetPasswordRequestClass}<http://wiki.optiplex-networks.com/xwiki/bin/export/XWiki/ResetPasswordRequestClass?format=xar&name=XWiki.ResetPasswordRequestClass&pages=XWiki.ResetPasswordRequestClass%7D>]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
it's probably the reason my Java instance is so unstable and hogging my systems swap. Can anything be done to sort it? ______________________________**_________________ users mailing list users@xwiki.org http://lists.xwiki.org/**mailman/listinfo/users<http://lists.xwiki.org/mailman/listinfo/users>
_______________________________________________ users mailing list users@xwiki.org http://lists.xwiki.org/mailman/listinfo/users
On Jan 9, 2012, at 5:06 PM, Guillaume Lerouge wrote:
Hi Kaya,
are you experiencing this on XWiki Enterprise 3.2?
If so, this is a know issue that will be fixed in XWiki Enterprise 3.2.1 which should be out pretty soon.
No this has nothing to do with what you are thinking about Guillaume :) (see Sergiu's answer). Thanks -Vincent
Guillaume
On Mon, Jan 9, 2012 at 5:01 PM, Kaya Saman <kayasaman@gmail.com> wrote:
Hi,
just checked through my logs and found this:
SEVERE: The web application [/xwiki] created a ThreadLocal with key of type [org.apache.log4j.helpers.**ThreadLocalMap] (value [org.apache.log4j.helpers.**ThreadLocalMap@2ff7ac92]) and a value of type [java.util.Hashtable] (value [{url=http://wiki.optiplex-** networks.com/xwiki/bin/export/**XWiki/**ResetPasswordRequestClass?** format=xar&name=XWiki.**ResetPasswordRequestClass&**pages=XWiki.** ResetPasswordRequestClass}<http://wiki.optiplex-networks.com/xwiki/bin/export/XWiki/ResetPasswordRequestClass?format=xar&name=XWiki.ResetPasswordRequestClass&pages=XWiki.ResetPasswordRequestClass%7D>]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
it's probably the reason my Java instance is so unstable and hogging my systems swap. Can anything be done to sort it?
Your wiki is running 2.4, it's written as the extreme bottom of the page. I don't know if it will help for this problem, but since you have some free time, you should think about upgrading your wiki ;-) Guillaume Fenollar 2012/1/9 Kaya Saman <kayasaman@gmail.com>
On 01/09/2012 06:06 PM, Guillaume Lerouge wrote:
Hi Kaya,
are you experiencing this on XWiki Enterprise 3.2?
If so, this is a know issue that will be fixed in XWiki Enterprise 3.2.1 which should be out pretty soon.
Guillaume
How can I check the version??
I can't remember when I built my wiki but it was probably back in 2010 or so.......
On Mon, Jan 9, 2012 at 5:01 PM, Kaya Saman<kayasaman@gmail.com> wrote:
Hi,
just checked through my logs and found this:
SEVERE: The web application [/xwiki] created a ThreadLocal with key of type [org.apache.log4j.helpers.****ThreadLocalMap] (value [org.apache.log4j.helpers.****ThreadLocalMap@2ff7ac92]) and a value of type [java.util.Hashtable] (value [{url=http://wiki.optiplex-** networks.com/xwiki/bin/export/****XWiki/****ResetPasswordRequestClass?**<http://networks.com/xwiki/bin/export/**XWiki/**ResetPasswordRequestClass?**> format=xar&name=XWiki.****ResetPasswordRequestClass&****pages=XWiki.** ResetPasswordRequestClass}<htt**p://wiki.optiplex-networks.** com/xwiki/bin/export/XWiki/**ResetPasswordRequestClass?** format=xar&name=XWiki.**ResetPasswordRequestClass&**pages=XWiki.** ResetPasswordRequestClass%7D<http://wiki.optiplex-networks.com/xwiki/bin/export/XWiki/ResetPasswordRequestClass?format=xar&name=XWiki.ResetPasswordRequestClass&pages=XWiki.ResetPasswordRequestClass%7D>
]**) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
it's probably the reason my Java instance is so unstable and hogging my systems swap. Can anything be done to sort it? ______________________________****_________________ users mailing list users@xwiki.org http://lists.xwiki.org/****mailman/listinfo/users<http://lists.xwiki.org/**mailman/listinfo/users> <http://**lists.xwiki.org/mailman/**listinfo/users<http://lists.xwiki.org/mailman/listinfo/users>
______________________________**_________________
users mailing list users@xwiki.org http://lists.xwiki.org/**mailman/listinfo/users<http://lists.xwiki.org/mailman/listinfo/users>
______________________________**_________________ users mailing list users@xwiki.org http://lists.xwiki.org/**mailman/listinfo/users<http://lists.xwiki.org/mailman/listinfo/users>
-- Guillaume Fenollar XWiki SysAdmin Tel : +33 (0)1.83.62.65.97
On 01/09/2012 07:20 PM, Guillaume Fenollar wrote:
Your wiki is running 2.4, it's written as the extreme bottom of the page.
I don't know if it will help for this problem, but since you have some free time, you should think about upgrading your wiki ;-)
Guillaume Fenollar
Was already on it :-) http://enterprise.xwiki.org/xwiki/bin/view/Main/Download http://www.xwiki.org/xwiki/bin/view/FAQ/HowCanIUpdateXWIKIFromAnOlderVersion My only concern is that I have the PhotoAlbum and Calendar .XAR and .JAR applications.... will upgrading cause any problems to these??? Regards, Kaya
2012/1/9 Kaya Saman<kayasaman@gmail.com>
On 01/09/2012 06:06 PM, Guillaume Lerouge wrote:
Hi Kaya,
are you experiencing this on XWiki Enterprise 3.2?
If so, this is a know issue that will be fixed in XWiki Enterprise 3.2.1 which should be out pretty soon.
Guillaume
How can I check the version??
I can't remember when I built my wiki but it was probably back in 2010 or so.......
On Mon, Jan 9, 2012 at 5:01 PM, Kaya Saman<kayasaman@gmail.com> wrote:
Hi,
just checked through my logs and found this:
SEVERE: The web application [/xwiki] created a ThreadLocal with key of type [org.apache.log4j.helpers.****ThreadLocalMap] (value [org.apache.log4j.helpers.****ThreadLocalMap@2ff7ac92]) and a value of type [java.util.Hashtable] (value [{url=http://wiki.optiplex-** networks.com/xwiki/bin/export/****XWiki/****ResetPasswordRequestClass?**<http://networks.com/xwiki/bin/export/**XWiki/**ResetPasswordRequestClass?**> format=xar&name=XWiki.****ResetPasswordRequestClass&****pages=XWiki.** ResetPasswordRequestClass}<htt**p://wiki.optiplex-networks.** com/xwiki/bin/export/XWiki/**ResetPasswordRequestClass?** format=xar&name=XWiki.**ResetPasswordRequestClass&**pages=XWiki.** ResetPasswordRequestClass%7D<http://wiki.optiplex-networks.com/xwiki/bin/export/XWiki/ResetPasswordRequestClass?format=xar&name=XWiki.ResetPasswordRequestClass&pages=XWiki.ResetPasswordRequestClass%7D>
]**) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
it's probably the reason my Java instance is so unstable and hogging my systems swap. Can anything be done to sort it? ______________________________****_________________ users mailing list users@xwiki.org http://lists.xwiki.org/****mailman/listinfo/users<http://lists.xwiki.org/**mailman/listinfo/users> <http://**lists.xwiki.org/mailman/**listinfo/users<http://lists.xwiki.org/mailman/listinfo/users> ______________________________**_________________ users mailing list users@xwiki.org http://lists.xwiki.org/**mailman/listinfo/users<http://lists.xwiki.org/mailman/listinfo/users>
______________________________**_________________ users mailing list users@xwiki.org http://lists.xwiki.org/**mailman/listinfo/users<http://lists.xwiki.org/mailman/listinfo/users>
On 01/09/2012 12:24 PM, Kaya Saman wrote:
On 01/09/2012 07:20 PM, Guillaume Fenollar wrote:
Your wiki is running 2.4, it's written as the extreme bottom of the page.
I don't know if it will help for this problem, but since you have some free time, you should think about upgrading your wiki ;-)
Guillaume Fenollar
Was already on it :-)
http://enterprise.xwiki.org/xwiki/bin/view/Main/Download
http://www.xwiki.org/xwiki/bin/view/FAQ/HowCanIUpdateXWIKIFromAnOlderVersion
My only concern is that I have the PhotoAlbum and Calendar .XAR and .JAR applications.... will upgrading cause any problems to these???
As far as I know, these shouldn't stop working, just that they're not considered good enough to be in the platform anymore, we need to rewrite them sometime soon. -- Sergiu Dumitriu http://purl.org/net/sergiu/
On 01/09/2012 07:36 PM, Sergiu Dumitriu wrote:
On 01/09/2012 12:24 PM, Kaya Saman wrote:
On 01/09/2012 07:20 PM, Guillaume Fenollar wrote:
Your wiki is running 2.4, it's written as the extreme bottom of the page.
I don't know if it will help for this problem, but since you have some free time, you should think about upgrading your wiki ;-)
Guillaume Fenollar
Was already on it :-)
http://enterprise.xwiki.org/xwiki/bin/view/Main/Download
http://www.xwiki.org/xwiki/bin/view/FAQ/HowCanIUpdateXWIKIFromAnOlderVersion
My only concern is that I have the PhotoAlbum and Calendar .XAR and .JAR applications.... will upgrading cause any problems to these???
As far as I know, these shouldn't stop working, just that they're not considered good enough to be in the platform anymore, we need to rewrite them sometime soon.
On that note I don't get Diaporama......!!! And the documentation is really poor for it :-( If someone could explain to me what it is I can amp up the documentation no probs ;-)
participants (5)
-
Guillaume Fenollar -
Guillaume Lerouge -
Kaya Saman -
Sergiu Dumitriu -
Vincent Massol