Return-Path: X-Original-To: apmail-tomcat-users-archive@www.apache.org Delivered-To: apmail-tomcat-users-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 0E7C110B7D for ; Wed, 8 May 2013 22:00:04 +0000 (UTC) Received: (qmail 98646 invoked by uid 500); 8 May 2013 22:00:00 -0000 Delivered-To: apmail-tomcat-users-archive@tomcat.apache.org Received: (qmail 98532 invoked by uid 500); 8 May 2013 22:00:00 -0000 Mailing-List: contact users-help@tomcat.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: "Tomcat Users List" Delivered-To: mailing list users@tomcat.apache.org Received: (qmail 98523 invoked by uid 99); 8 May 2013 22:00:00 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 08 May 2013 22:00:00 +0000 X-ASF-Spam-Status: No, hits=0.0 required=5.0 tests=RCVD_IN_DNSWL_NONE,SPF_PASS,UNPARSEABLE_RELAY X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of Chuck.Caldarale@unisys.com designates 216.82.251.11 as permitted sender) Received: from [216.82.251.11] (HELO mail1.bemta12.messagelabs.com) (216.82.251.11) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 08 May 2013 21:59:51 +0000 Received: from [216.82.249.147:4764] by server-11.bemta-12.messagelabs.com id 63/8C-26064-2CACA815; Wed, 08 May 2013 21:59:30 +0000 X-Env-Sender: Chuck.Caldarale@unisys.com X-Msg-Ref: server-13.tower-29.messagelabs.com!1368050336!22195552!13 X-Originating-IP: [192.61.61.104] X-StarScan-Received: X-StarScan-Version: 6.9.6; banners=-,-,- X-VirusChecked: Checked Received: (qmail 27997 invoked from network); 8 May 2013 21:59:29 -0000 Received: from unknown (HELO USEA-NAEDGE1.unisys.com) (192.61.61.104) by server-13.tower-29.messagelabs.com with RC4-SHA encrypted SMTP; 8 May 2013 21:59:29 -0000 Received: from usea-nahubcas2.na.uis.unisys.com (129.224.76.115) by USEA-NAEDGE1.unisys.com (192.61.61.104) with Microsoft SMTP Server (TLS) id 8.3.83.0; Wed, 8 May 2013 16:59:28 -0500 Received: from USEA-EXCH8.na.uis.unisys.com ([129.224.76.41]) by usea-nahubcas2.na.uis.unisys.com ([129.224.76.115]) with mapi; Wed, 8 May 2013 16:59:29 -0500 From: "Caldarale, Charles R" To: Tomcat Users List Date: Wed, 8 May 2013 16:59:28 -0500 Subject: RE: Tomcat thread dump analysis Thread-Topic: Tomcat thread dump analysis Thread-Index: Ac5MEj9Cp0xATXgoShuazvcCg65X4wAJBmJg Message-ID: <99C8B2929B39C24493377AC7A121E21FC4AD231550@USEA-EXCH8.na.uis.unisys.com> References: <3840CB1C-14C2-43C6-8A36-25587B5C4D10@gopivotal.com> <518A484E.6050104@christopherschultz.net> <99C8B2929B39C24493377AC7A121E21FC4AD16A25D@USEA-EXCH8.na.uis.unisys.com> <518A8C57.4070007@christopherschultz.net> In-Reply-To: <518A8C57.4070007@christopherschultz.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Virus-Checked: Checked by ClamAV on apache.org > From: Christopher Schultz [mailto:chris@christopherschultz.net]=20 > Subject: Re: Tomcat thread dump analysis > > It would appear that logic in your application threads has either=20 > > created a deadlock, or failed to unlock something before > > returning, > That's a tall order unless native code is involved, I believe. Nope, it's terribly easy with java.util.concurrent. For example, you can c= reate Semaphore objects, and then forget to call release() after calling ac= quire(). It's not block-structured like synchronization constructs built i= nto the Java language. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MA= TERIAL and is thus for use only by the intended recipient. If you received = this in error, please contact the sender and delete the e-mail and its atta= chments from all computers. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org For additional commands, e-mail: users-help@tomcat.apache.org