How to clear PermGen in tomcat without restart
1
I want to clear PermGen memory in tomcat without restarting tomcat.
How can do this activity? I get:
PermGen: OutOfMemoryError
My problem is that I don't want to shut down tomcat.
java tomcat permgen
edited Nov 22 '18 at 16:35
Green
785529
asked Nov 22 '18 at 14:49
ErenSalmanErenSalman
62
|
show 3 more comments
1
I want to clear PermGen memory in tomcat without restarting tomcat.
How can do this activity? I get:
PermGen: OutOfMemoryError
My problem is that I don't want to shut down tomcat.
java tomcat permgen
edited Nov 22 '18 at 16:35
Green
785529
asked Nov 22 '18 at 14:49
ErenSalmanErenSalman
62
1
I'm not sure this is even possible (or at least not easy). This problem already exists for quite a while and if it were easy to solve without a restart it probably would be part of Tomcat - at least in the form of some documentation.
– Thomas
Nov 22 '18 at 14:52
I would say why and you should not instead fix the root cause. Increase the heap settings and then see if that helps. Check this thread stackoverflow.com/questions/10085028/…
– Sheetal Mohan Sharma
Nov 22 '18 at 15:25
My main purpose is to do deployment with downtime zero. When i searched this topic, i found "paralel deployment" in tomcat. But after a while tomcat's memory (also permGen) is increased. Because i do not restart during deployment. So i want to find a way to stop or clear increased memory.
– ErenSalman
Nov 22 '18 at 15:27
Which Tomcat version are you using ? If old, maybe it's necessary to upgrade since some issues were corrected that could help you.
– Eugène Adell
Nov 22 '18 at 15:33
1
When you undeploy the old version of your app, do you get warnings about potential leak issues? On successful full undeployment of an app tomcat should be able to garbage collect that apps' WebAppClassLoader and thus free the permgen from classes. If there is a Thread or ThreadLocale left on your app, undeployment won't fully succeed and your permGen will fill which each start/stop of your app.
– Selaron
Nov 22 '18 at 15:50
|
show 3 more comments
1
1
1
1
I want to clear PermGen memory in tomcat without restarting tomcat.
How can do this activity? I get:
PermGen: OutOfMemoryError
My problem is that I don't want to shut down tomcat.
java tomcat permgen
edited Nov 22 '18 at 16:35
Green
785529
asked Nov 22 '18 at 14:49
ErenSalmanErenSalman
62
I want to clear PermGen memory in tomcat without restarting tomcat.
How can do this activity? I get:
PermGen: OutOfMemoryError
My problem is that I don't want to shut down tomcat.
java tomcat permgen
java tomcat permgen
edited Nov 22 '18 at 16:35
Green
785529
asked Nov 22 '18 at 14:49
ErenSalmanErenSalman
62
edited Nov 22 '18 at 16:35
Green
785529
asked Nov 22 '18 at 14:49
ErenSalmanErenSalman
62
edited Nov 22 '18 at 16:35
Green
785529
edited Nov 22 '18 at 16:35
Green
785529
edited Nov 22 '18 at 16:35
Green
785529
785529
asked Nov 22 '18 at 14:49
ErenSalmanErenSalman
62
asked Nov 22 '18 at 14:49
ErenSalmanErenSalman
62
asked Nov 22 '18 at 14:49
ErenSalmanErenSalman
62
62
1
I'm not sure this is even possible (or at least not easy). This problem already exists for quite a while and if it were easy to solve without a restart it probably would be part of Tomcat - at least in the form of some documentation.
– Thomas
Nov 22 '18 at 14:52
I would say why and you should not instead fix the root cause. Increase the heap settings and then see if that helps. Check this thread stackoverflow.com/questions/10085028/…
– Sheetal Mohan Sharma
Nov 22 '18 at 15:25
My main purpose is to do deployment with downtime zero. When i searched this topic, i found "paralel deployment" in tomcat. But after a while tomcat's memory (also permGen) is increased. Because i do not restart during deployment. So i want to find a way to stop or clear increased memory.
– ErenSalman
Nov 22 '18 at 15:27
Which Tomcat version are you using ? If old, maybe it's necessary to upgrade since some issues were corrected that could help you.
– Eugène Adell
Nov 22 '18 at 15:33
1
When you undeploy the old version of your app, do you get warnings about potential leak issues? On successful full undeployment of an app tomcat should be able to garbage collect that apps' WebAppClassLoader and thus free the permgen from classes. If there is a Thread or ThreadLocale left on your app, undeployment won't fully succeed and your permGen will fill which each start/stop of your app.
– Selaron
Nov 22 '18 at 15:50
|
show 3 more comments
1
I'm not sure this is even possible (or at least not easy). This problem already exists for quite a while and if it were easy to solve without a restart it probably would be part of Tomcat - at least in the form of some documentation.
– Thomas
Nov 22 '18 at 14:52
I would say why and you should not instead fix the root cause. Increase the heap settings and then see if that helps. Check this thread stackoverflow.com/questions/10085028/…
– Sheetal Mohan Sharma
Nov 22 '18 at 15:25
My main purpose is to do deployment with downtime zero. When i searched this topic, i found "paralel deployment" in tomcat. But after a while tomcat's memory (also permGen) is increased. Because i do not restart during deployment. So i want to find a way to stop or clear increased memory.
– ErenSalman
Nov 22 '18 at 15:27
Which Tomcat version are you using ? If old, maybe it's necessary to upgrade since some issues were corrected that could help you.
– Eugène Adell
Nov 22 '18 at 15:33
1
When you undeploy the old version of your app, do you get warnings about potential leak issues? On successful full undeployment of an app tomcat should be able to garbage collect that apps' WebAppClassLoader and thus free the permgen from classes. If there is a Thread or ThreadLocale left on your app, undeployment won't fully succeed and your permGen will fill which each start/stop of your app.
– Selaron
Nov 22 '18 at 15:50
1
1
I'm not sure this is even possible (or at least not easy). This problem already exists for quite a while and if it were easy to solve without a restart it probably would be part of Tomcat - at least in the form of some documentation.
– Thomas
Nov 22 '18 at 14:52
I'm not sure this is even possible (or at least not easy). This problem already exists for quite a while and if it were easy to solve without a restart it probably would be part of Tomcat - at least in the form of some documentation.
– Thomas
Nov 22 '18 at 14:52
I would say why and you should not instead fix the root cause. Increase the heap settings and then see if that helps. Check this thread stackoverflow.com/questions/10085028/…
– Sheetal Mohan Sharma
Nov 22 '18 at 15:25
I would say why and you should not instead fix the root cause. Increase the heap settings and then see if that helps. Check this thread stackoverflow.com/questions/10085028/…
– Sheetal Mohan Sharma
Nov 22 '18 at 15:25
My main purpose is to do deployment with downtime zero. When i searched this topic, i found "paralel deployment" in tomcat. But after a while tomcat's memory (also permGen) is increased. Because i do not restart during deployment. So i want to find a way to stop or clear increased memory.
– ErenSalman
Nov 22 '18 at 15:27
My main purpose is to do deployment with downtime zero. When i searched this topic, i found "paralel deployment" in tomcat. But after a while tomcat's memory (also permGen) is increased. Because i do not restart during deployment. So i want to find a way to stop or clear increased memory.
– ErenSalman
Nov 22 '18 at 15:27
Which Tomcat version are you using ? If old, maybe it's necessary to upgrade since some issues were corrected that could help you.
– Eugène Adell
Nov 22 '18 at 15:33
Which Tomcat version are you using ? If old, maybe it's necessary to upgrade since some issues were corrected that could help you.
– Eugène Adell
Nov 22 '18 at 15:33
1
1
When you undeploy the old version of your app, do you get warnings about potential leak issues? On successful full undeployment of an app tomcat should be able to garbage collect that apps' WebAppClassLoader and thus free the permgen from classes. If there is a Thread or ThreadLocale left on your app, undeployment won't fully succeed and your permGen will fill which each start/stop of your app.
– Selaron
Nov 22 '18 at 15:50
When you undeploy the old version of your app, do you get warnings about potential leak issues? On successful full undeployment of an app tomcat should be able to garbage collect that apps' WebAppClassLoader and thus free the permgen from classes. If there is a Thread or ThreadLocale left on your app, undeployment won't fully succeed and your permGen will fill which each start/stop of your app.
– Selaron
Nov 22 '18 at 15:50
|
show 3 more comments
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1
I'm not sure this is even possible (or at least not easy). This problem already exists for quite a while and if it were easy to solve without a restart it probably would be part of Tomcat - at least in the form of some documentation.
– Thomas
Nov 22 '18 at 14:52
I would say why and you should not instead fix the root cause. Increase the heap settings and then see if that helps. Check this thread stackoverflow.com/questions/10085028/…
– Sheetal Mohan Sharma
Nov 22 '18 at 15:25
My main purpose is to do deployment with downtime zero. When i searched this topic, i found "paralel deployment" in tomcat. But after a while tomcat's memory (also permGen) is increased. Because i do not restart during deployment. So i want to find a way to stop or clear increased memory.
– ErenSalman
Nov 22 '18 at 15:27
Which Tomcat version are you using ? If old, maybe it's necessary to upgrade since some issues were corrected that could help you.
– Eugène Adell
Nov 22 '18 at 15:33
1
When you undeploy the old version of your app, do you get warnings about potential leak issues? On successful full undeployment of an app tomcat should be able to garbage collect that apps' WebAppClassLoader and thus free the permgen from classes. If there is a Thread or ThreadLocale left on your app, undeployment won't fully succeed and your permGen will fill which each start/stop of your app.
– Selaron
Nov 22 '18 at 15:50