+1 for HttpClient. 2010/12/1 Mike Schrag <msch...@pobox.com>
> Just never use that class. Rewrite your stuff with Commons HttpClient and > you'll be happier all around. > > Sent from my iPhone > > On Dec 1, 2010, at 2:00 AM, D Tim Cummings <t...@triptera.com.au> wrote: > > Hi Q > > WOHTTPConnection sendRequest(WORequest request) creates a new thread to > implement timeout. I was creating threads also because the sendRequest > implementation of timeout wasn't working for me. I disabled my code that > created threads but was still getting the OutOfMemory problem. > > Start of the thread dump below. I was able to reproduce the problem by > manually clicking on the refresh page button over and over again. > > jstack 9451 > 2010-12-01 16:52:02 > Full thread dump Java HotSpot(TM) 64-Bit Server VM (16.3-b01 mixed mode): > > "Attach Listener" daemon prio=10 tid=0x0000000057371800 nid=0x4485 waiting > on condition [0x0000000000000000] > java.lang.Thread.State: RUNNABLE > > "Thread-1129" prio=10 tid=0x0000000057093800 nid=0x2cde in Object.wait() > [0x000000005bb4a000] > java.lang.Thread.State: WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > - waiting on <0x00002aaab07d17a8> (a [Z) > at java.lang.Object.wait(Object.java:485) > at > com.webobjects.appserver._private.WOUrlConnection$UrlDataReader.run(WOUrlConnection.java:452) > - locked <0x00002aaab07d17a8> (a [Z) > at java.lang.Thread.run(Thread.java:619) > > "Thread-1126" prio=10 tid=0x00000000564f8000 nid=0x2cdb in Object.wait() > [0x000000005ba49000] > java.lang.Thread.State: WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > - waiting on <0x00002aaab0784fc8> (a [Z) > at java.lang.Object.wait(Object.java:485) > at > com.webobjects.appserver._private.WOUrlConnection$UrlDataReader.run(WOUrlConnection.java:452) > - locked <0x00002aaab0784fc8> (a [Z) > at java.lang.Thread.run(Thread.java:619) > > "Thread-1123" prio=10 tid=0x00000000564af000 nid=0x2cd8 in Object.wait() > [0x000000005b948000] > java.lang.Thread.State: WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > - waiting on <0x00002aaab073c040> (a [Z) > at java.lang.Object.wait(Object.java:485) > at > com.webobjects.appserver._private.WOUrlConnection$UrlDataReader.run(WOUrlConnection.java:452) > - locked <0x00002aaab073c040> (a [Z) > at java.lang.Thread.run(Thread.java:619) > > "Thread-1120" prio=10 tid=0x00000000563e0800 nid=0x2cd5 in Object.wait() > [0x000000005b847000] > java.lang.Thread.State: WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > - waiting on <0x00002aaab06f18f0> (a [Z) > at java.lang.Object.wait(Object.java:485) > at > com.webobjects.appserver._private.WOUrlConnection$UrlDataReader.run(WOUrlConnection.java:452) > - locked <0x00002aaab06f18f0> (a [Z) > at java.lang.Thread.run(Thread.java:619) > > "Thread-1117" prio=10 tid=0x000000005695c000 nid=0x2cd2 in Object.wait() > [0x000000005b746000] > java.lang.Thread.State: WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > - waiting on <0x00002aaab06a5360> (a [Z) > at java.lang.Object.wait(Object.java:485) > at > com.webobjects.appserver._private.WOUrlConnection$UrlDataReader.run(WOUrlConnection.java:452) > - locked <0x00002aaab06a5360> (a [Z) > at java.lang.Thread.run(Thread.java:619) > > "Thread-1114" prio=10 tid=0x00000000566de800 nid=0x2cc0 in Object.wait() > [0x000000005b645000] > java.lang.Thread.State: WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > - waiting on <0x00002aaab0659af8> (a [Z) > at java.lang.Object.wait(Object.java:485) > at > com.webobjects.appserver._private.WOUrlConnection$UrlDataReader.run(WOUrlConnection.java:452) > - locked <0x00002aaab0659af8> (a [Z) > at java.lang.Thread.run(Thread.java:619) > > "Thread-1111" prio=10 tid=0x0000000057098800 nid=0x2cbd in Object.wait() > [0x000000005b544000] > java.lang.Thread.State: WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > - waiting on <0x00002aaab060e6a0> (a [Z) > at java.lang.Object.wait(Object.java:485) > at > com.webobjects.appserver._private.WOUrlConnection$UrlDataReader.run(WOUrlConnection.java:452) > - locked <0x00002aaab060e6a0> (a [Z) > at java.lang.Thread.run(Thread.java:619) > > "Thread-1108" prio=10 tid=0x0000000057097800 nid=0x2cba in Object.wait() > [0x000000005b443000] > java.lang.Thread.State: WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > - waiting on <0x00002aaab05c45f8> (a [Z) > at java.lang.Object.wait(Object.java:485) > at > com.webobjects.appserver._private.WOUrlConnection$UrlDataReader.run(WOUrlConnection.java:452) > - locked <0x00002aaab05c45f8> (a [Z) > at java.lang.Thread.run(Thread.java:619) > > "Thread-1105" prio=10 tid=0x0000000057330000 nid=0x2cb7 in Object.wait() > [0x000000005b342000] > java.lang.Thread.State: WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > - waiting on <0x00002aaab057f298> (a [Z) > at java.lang.Object.wait(Object.java:485) > at > com.webobjects.appserver._private.WOUrlConnection$UrlDataReader.run(WOUrlConnection.java:452) > - locked <0x00002aaab057f298> (a [Z) > at java.lang.Thread.run(Thread.java:619) > > "Thread-1102" prio=10 tid=0x00000000564b5800 nid=0x2cb4 in Object.wait() > [0x000000005b241000] > java.lang.Thread.State: WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > - waiting on <0x00002aaab0535cc8> (a [Z) > at java.lang.Object.wait(Object.java:485) > at > com.webobjects.appserver._private.WOUrlConnection$UrlDataReader.run(WOUrlConnection.java:452) > - locked <0x00002aaab0535cc8> (a [Z) > at java.lang.Thread.run(Thread.java:619) > > "Thread-1099" prio=10 tid=0x00000000564ee000 nid=0x2cb1 in Object.wait() > [0x000000005b140000] > java.lang.Thread.State: WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > - waiting on <0x00002aaab04e9d98> (a [Z) > at java.lang.Object.wait(Object.java:485) > at > com.webobjects.appserver._private.WOUrlConnection$UrlDataReader.run(WOUrlConnection.java:452) > - locked <0x00002aaab04e9d98> (a [Z) > at java.lang.Thread.run(Thread.java:619) > > "Thread-1096" prio=10 tid=0x000000005699a800 nid=0x2cae in Object.wait() > [0x000000005b03f000] > java.lang.Thread.State: WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > - waiting on <0x00002aaab049ea28> (a [Z) > at java.lang.Object.wait(Object.java:485) > at > com.webobjects.appserver._private.WOUrlConnection$UrlDataReader.run(WOUrlConnection.java:452) > - locked <0x00002aaab049ea28> (a [Z) > at java.lang.Thread.run(Thread.java:619) > > > > On 01/12/2010, at 4:04 PM, Q wrote: > > > On 01/12/2010, at 3:36 PM, D Tim Cummings wrote: > > We have a sessionless app that we have been running for years on Mac OS X > on XServes. We recently moved it to Red Hat servers and now we are getting > Out of Memory errors even though we have significantly increased the memory > available. Red Hat is using the java sun jvm 1.6.0_20 64 bit, while the Mac > servers were running java from Apple 1.5.0_24. I also tried on my Mac > workstation using Apple java 1.6.0.22 64 bit and the memory appeared to be > getting garbage collected without problem. > > I configured the app to do a heap dump when the error occured (Additional > arguments -XX:+HeapDumpOnOutOfMemoryError ) and used the Eclipse Memory > Analyzer Tool ( <http://www.eclipse.org/mat>http://www.eclipse.org/mat) > and it reported the following problem suspects: > > 1,296 instances of "java.lang.Thread", loaded by "<system class > loader>" occupy 111,947,632 (43.21%) bytes. > 1,292 instances of "er.extensions.eof.ERXEC", loaded > by "java.net.URLClassLoader @ 0x2aaab375b7c0" occupy 37,478,352 > (14.46%) bytes. > 1,280 instances of "er.extensions.appserver.ERXRequest", loaded > by "java.net.URLClassLoader @ 0x2aaab375b7c0" occupy 27,297,992 > (10.54%) bytes. > > > It looks to me like your app had 1280 odd concurrent request handling > threads running. Is it likely that they are getting deadlocked or not > running to completion? Do you launch any new threads programmatically? > > Try making a thread dump of the app and see what's running. > > -- > Seeya...Q > > Quinton Dolan - <qdo...@gmail.com>qdo...@gmail.com > Gold Coast, QLD, Australia (GMT+10) > > > > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/webobjects-dev/mschrag%40pobox.com > > This email sent to <msch...@pobox.com>msch...@pobox.com > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/webobjects-dev/probert%40macti.ca > > This email sent to prob...@macti.ca >
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