From users-return-267143-archive-asf-public=cust-asf.ponee.io@tomcat.apache.org Sat Mar 16 00:00:57 2019 Return-Path: X-Original-To: archive-asf-public@cust-asf.ponee.io Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx-eu-01.ponee.io (Postfix) with SMTP id 59234180627 for ; Sat, 16 Mar 2019 01:00:56 +0100 (CET) Received: (qmail 30084 invoked by uid 500); 16 Mar 2019 00:00:54 -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 30071 invoked by uid 99); 16 Mar 2019 00:00:54 -0000 Received: from mail-relay.apache.org (HELO mailrelay2-lw-us.apache.org) (207.244.88.137) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 16 Mar 2019 00:00:54 +0000 Received: from Christophers-MacBook-Pro-2.local (pool-108-28-187-75.washdc.fios.verizon.net [108.28.187.75]) by mailrelay2-lw-us.apache.org (ASF Mail Server at mailrelay2-lw-us.apache.org) with ESMTPSA id C14B53236 for ; Sat, 16 Mar 2019 00:00:53 +0000 (UTC) Subject: Re: 2 instance of ParallelWebAppClassLoaders in Tomcat JVM To: users@tomcat.apache.org References: <6988b46f-e209-8e57-20ef-e7ad4c9726df@apache.org> From: Christopher Schultz Openpgp: preference=signencrypt Autocrypt: addr=chris@christopherschultz.net; prefer-encrypt=mutual; keydata= mQINBE+pgz4BEADd7qAWgqXcNltlB3aow0UneRmNSVjHKgekgs0ZXxG9l50Athksr/3bL/yg bxFB00JcM9W+UxLhKHiMSyzfeBHn9l9wAlLFKs0S91KXTUnRwGFtvgstvGROoqPgTVREklnm yW/KpzOwqSrQ5xHcogaT+XWlXmRbtFypi52Z5HGWlFWWgwx0vKBWHmQayPtCif0v1RDxfdV9 zziodn0TnpfBQsEgf9TDAjkNT8f0ecwTnhSihTDm1W5HCK7Pm5DfUtree1Oh6Ncz2ljlUO0b 3Lai9pX48eZOj7WQXPefkcv2AoUvdELkQKw3klM5YNXbXPf1KAjky+q4DQ1ydD6LkK+9cI3S TeMesTlk/tytOsaN2NH2k87sEpcumbH0AcmPFEnIYUfm4KzWdKlYA6mbV3Pk3tHSuayyJovj h/7Y7BG9p2l7D60r49hzrTPG8VxNkSliNLcSjI3QjYpfhSlqmqXyVKzdzirK1HPr1xfJStig RpLP9nWarZjoXng9N0etGwtH/8roeDPYA8x9ba1KXy/1g/i+RLx2ms+rueCpnFZxU3GZNUSp RfpdUbwCN3Zm1w5Z6SI8X2aSnWWeYzU6HMsV+P4PROnFsgxDeOpyWhyEaaVLXQtOYwcHneHb n56vSG50TkAuHs5kk/3/YDPSsqjsUPOuhKgFMh3iqMTh5DMdSwARAQABtDJDaHJpc3RvcGhl ciBTY2h1bHR6IDxjaHJpc0BjaHJpc3RvcGhlcnNjaHVsdHoubmV0PokCOgQTAQgAJAIbLwUL CQgHAwUVCgkICwUWAgMBAAIeAQIXgAUCT6mETgIZAQAKCRDzrVyUpn9wflkxD/9IsahRqHTV /hH5nuPqVO692cQqHvPtMPO6lDb4909VN5T1i+1hFr80P0KVDL6EI78lDBJ2TThWI0o5vFdm sRlei59wsgTvkKTph5QwwOWl7OyzUDX3WbKhkNQdGf4I+/g/1s2bHaRoG30ELdL7cwUPCPrW 0KQwBy7Rtr0WbdujKOw9b/UcgyXEOE1wNcorq/E1o5/6BRYIcFQOO4sjHjGcChOpSg5ms4zb s+Xv3gOtLrbmOPRTXdvBxwJA6kkfQFHvI42kXYghTdqhBVPnHYPqUeavRsb+Yz3ghkZhj35i GfaGyXNwFBikCYjzIaj44NOkT1pU50MgIbjSJ+xoHnC20T942kekqp6wzqUM19Pa9ohsEdA1 Sf6/A7RmpZRrxSIY02ZVnGccnVjglnylVcnxrNAZC3ebxCeZPQ09FBR0Uqlsrdt7A3hlEP2F aoMTSa+hYqfWBGB7uZhcJZIsZspxm8J0txeOzYNSFDl7mF134ShRsq6dpSugCdcdeSWKliBz q0U8sIabOFLMxM0hbwkn2RG4OaurJLWXQf+7IhA/J8TizjkbdxLmR2PiTiVtrx484mpWpbF8 po/em0q/reFnL+JtOM6qlJE/Q4B6PfkchhU5vKPfmGw98t9guyw5G8YSR1rR+SOowHg4T/i2 Rezz1idKmoFpPdNFRPlOAC+d67kCDQRPqYM+ARAAzEItVpzvcgZB+faUWi54lJoA8GnVxXEe OQY+7wk/P5i9GtL0UVXC53j2F87BDVXGalKgVjEVdNY3Cyx+dJ2os65gjxd6ZK18zc6N7YZB Z00XNU9nTz5XImZzHn4VmeXYMQrKO/981nCNPlV6CVdgGg9wl1Ij5Sh8SSTb8kWSo1ngx+XX 4yJNUbfSh32yMPVGI7ZcoZLm9gdgTOOnuEkeeGs/lPvYN+1Cv/YtvkPybSOSWSdHxIVU4Iko 6V7IkM1amjdwKfoeg+CLhZsbY7VLAzVtGvaF5z4rtJtCfTfhbYD0wS8afEBcvsew1HdtYDT5 AJqojeZBGDuY7JCgALc3HCy34Zzk+mi1qwvrm5i/CBMuIvjxB2MkzhHQNUD20fzdRcoIgw4J IzbqZLlOpVFehDXzKT/h5vh+Uv7s6Rz5gP5i0Rkcghw00mRBvuN8mpQnLt4hYL22cNh/tk0L Fxda7ZaPehu7ug4E5FEB0Ifm1KV18P7Kpfu8tiSLz7rl++x73o4uv4bk1ZnjO/jFsx0KLGwq VxR276ZIwsV4WpLYvJ5fR0kqqd/TOKXGSEA0eGxWTeb/fNtkYemRVoasB1+rqjh/Rz0p20o8 elkqDhpzzhrMNzEMYkLySu7npWCeWW4Nd6097+OG9BCLO+ndGmAcupdu6WMEj2UlWsQxuCYC PgsAEQEAAYkEPgQYAQgACQUCT6mDPgIbLgIpCRDzrVyUpn9wfsFdIAQZAQgABgUCT6mDPgAK CRAc8Ck/pTykWO6WD/0XlAG4D4GwzzuOfh7DG6cm/I0vmASEJkY5ghStW4GUbYosgS/btyj/ YPWzVh4HWMvuA6YYKCuz/CM3h34dR25XmHqUdOyJOCnMJ3psdv5YsytgnEdvINZALlDdBX3G sfytgS0KnVjAc92LfJOxHAsZf4zE3SU28FMX7jCgeqO3YrvkHsZ8dzzgw3QYT0J3NcYfkflb DPBXBDGrvdUuea/w6F17pctdRdt7jE3JiLFq2F9ehXOSsIwecUlqVYiCRuxblD4cJ6gKMn0y 8zllW4GyIbf/+mNLkpKoMPYnptDvcEojluHtwbkSfF5AwgJbm6pfs9a2vpGBVko+dBXGh4/T 3qNYxeGEAsI0psEJu3EZN9dYv/ZOb69DUJ6SwEKp/L7lU7C8HoLx/MpKtuJO9OS5uuAhdBSi GqfaN9zP2NxPXSwnexVK2exy/h5sUevDsnBEHmyxe5GRSrIilyijLtlYhq2W7G95poxIFZuL Db98R+7VR9Yl9uOZ6kRBJmzp9X2oB8MDHoKe4QEuiRx/5/DNxB8i2QoTWN/BfluTSfVpO5rf jSXlaUuFOnouBrWdmbaBdg+47m4IGEz129Zdf+y+ISexQ6P16ZY1oYxYlbQSaEwk0+TJ4B0C uvMHwPF3SDH2LeRx+mK2OvwnVulvj2+WdW/rIVgwhwbKmBLj40R+Uq4zD/4iRxJ5PF1ynjxR po3Izp/ZrYWrPgtBg0jUZ8DdlAiRHCFGPpccK8RvBWXmtzF4XQsV39aPBqcE3W6IcTnIMrDi 6mnqealpfiUq+4RGNfRFN9wtgViZLy/FRWi76k+vo/Jmp7/K9JblGX48D2JL9FX0w5PXkpE4 abmY1OASQUiwoJ4n1asxwEonSaWeYbI7X5IqdvevGyfYdSn4VEywdrYGtWjsWlZ/DPofPwsI bQXGY6o+wg9lDAk2L2nVTa05XuyOooUPwKLD0WrLOIxLmcbVv/tgJG03/uI4iDitSofTKnpz E+xdpfFIyw1Mb8PO4WJi0gpHmmLUbG8AMLS+8wSDFwIA4TXQFy9suXXzLuuzML+G5h9Mo5D6 q5HsIe59lhdwk7oEPZJ1NWLfLavTENQg5ObS2YT1KaFskFxxgtcU0aBytAxTjkgGRB8UunXl NJeCuTIAUxXw41P93V4Khigc5dEOG1kEDoq0dAlAE7AbL6Vzc/Go+UwivtUil3sXADOyM9PT JjLNnye+2V0ywQncJ1AG6sxICpPKzv8oYP6xwurEuKnF8DAWEHEwT+Fb277Idv1v8uMGvltp coe7olE0O+TRUtMEwtEp4g4m8ym1rJI/yfwXtHkS8QcVBA9LRqcWEna1VPlT1pk3BSq/1xQa F/4OLScBfV2JbF93sN0SLw== Message-ID: Date: Fri, 15 Mar 2019 20:00:53 -0400 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.5.3 MIME-Version: 1.0 In-Reply-To: <6988b46f-e209-8e57-20ef-e7ad4c9726df@apache.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Mark, On 3/15/19 19:49, Mark Thomas wrote: > On 15/03/2019 17:51, Shankar P S wrote: >> @Mark Thanks for the tip. I compared the 2 heap dumps. For the >> same server.xml config, 8.5.38 version of Tomcat creates 3 >> StandardContext instances. I see that these 3 objects have their >> own hierarchy. ---- *Tomcat 8.5.38 - 3 instances of >> StandardContext* >> >> First instance originalDocBase >> "/var/www/tomcat/webapps/ROOT.war", docBase "ROOT", displayName >> "/", workDir "work/Catalina/localhost/ROOT" >> >> Second instance docBase ROOT.war, workDir >> "work/Catalina/localhost/ROOT" >> >> Third instance originalDocBase >> "/var/www/tomcat/webapps/ROOT.war", docBase "ROOT", displayName >> "/", workDir "work/Catalina/localhost/ROOT" > > Odd. Worth checking the state field for each of those instances. > > Check the logs. You should see start (and hopefully some stop) > messages for those. > > Is it possible the app has been reloaded? +1 Shankar, if it's possible to modify the web application, you might want to use a ServletContextListener to purge that cache on application shutdown. If the application itself has a ClassLoader leak (which is common), cleaning-up a little bit on shutdown can stop the bleeding while you investigate the root cause of any ClassLoader leak. - -chris -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAlyMPLQACgkQHPApP6U8 pFiWxQ//aAopKwEpHy95eoGPIFZfTW28Wif3dWyk+oE2RDy+0hQaOROgHDvqUVCC VOSbApqAwV/jvE+VW1fFrML8T3hVTbxN2oRPYjjljbMyYAaQMiu2sFX8u0+I2O+A XT+BuIA1Sf0ZzeNEd7X892rdG5omH7TL8w4Xa1errsXxwUaTVr2l6QqZfpLpRSRP uBjUXdH/Qkxu0eJ55pPxgfmgdfOU28fE7bd+absloXYitCxW6KnyxgL/GCaFq44t eSmOfxNI/7RQc64x/R+niPF3i1CDFZreEuBu6+2negPwWgQNGQrSTyQY2jnB8ZOa 5weROOdOQtKlr1Nw6wW/y3Asx9ti/lDBpbzyDLMRe+q4PGV/A2t2mRoNDdmPdHje famrH3kk0B6ijn4rVe2HO68ca/sJuMLMP8itrj72+gAWEEGorzkSBBJg7Hr2Czzm dIjfCqV8u1dVCmexn+dYc990gHp/TvnUCEZpFuySdq1le8yKLU2BhRBiZA88uR0m F8rRYrAQZDHZ6GOcQLS8C261O58HBPglOuatgej5EW0Ys7MqLnOh6IeK5NKpjLdT dyGkOBCB7sqC/1DYmfT5EJlhzTJ/tbn/8kyfZfJOKBGgr+xZv23tfVHVNv1LJuGJ J/2k6IRcQzariMTCTUTmU7I/oXfsoK8lffSGEmfjMGYV+slDQs8= =66tB -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org For additional commands, e-mail: users-help@tomcat.apache.org