Return-Path: Delivered-To: apmail-hadoop-general-archive@minotaur.apache.org Received: (qmail 5001 invoked from network); 22 May 2010 02:38:42 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 22 May 2010 02:38:42 -0000 Received: (qmail 93601 invoked by uid 500); 22 May 2010 02:38:41 -0000 Delivered-To: apmail-hadoop-general-archive@hadoop.apache.org Received: (qmail 93505 invoked by uid 500); 22 May 2010 02:38:41 -0000 Mailing-List: contact general-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: general@hadoop.apache.org Delivered-To: mailing list general@hadoop.apache.org Received: (qmail 93497 invoked by uid 99); 22 May 2010 02:38:40 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 22 May 2010 02:38:40 +0000 X-ASF-Spam-Status: No, hits=2.2 required=10.0 tests=FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL,WEIRD_PORT X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of yuzhihong@gmail.com designates 209.85.221.184 as permitted sender) Received: from [209.85.221.184] (HELO mail-qy0-f184.google.com) (209.85.221.184) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 22 May 2010 02:38:33 +0000 Received: by qyk14 with SMTP id 14so219607qyk.21 for ; Fri, 21 May 2010 19:38:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:date:message-id :subject:from:to:content-type; bh=3d44V9v1VJoGxWuTVfQ/NR5wKKpoRjfnsAnyCnZavtE=; b=jkxfZ8k1Db7wTm/kEfgaZ8dN/mv7PUM5o3NN03RSawY649IGw3aicYDPNb4nV9BtY8 bOdb3T+KiMZf9DXeygbbSY702KV1yfb9Dso++EdMWnDDCuTsQD6CPPgoVIVq6JBIGIwe mVAnf5OkjSe/2HvwI4qg1aT2Jjq/84iqqkCo4= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=vE5wLq2ZEODbY94bUIIopRF5tg2rrhIT2luR5MIQI0hLqB61NdbIMEgHtwqiRQIUtQ FarYgMecllTV8DyThdfhepk7RMsvA+cTvo017Trk9CMfW3EDdcH8l51TBjqUT5Sd8Lqv /nXLrSypBfSNgDHSney1CY2bEl8VXB74sGTi4= MIME-Version: 1.0 Received: by 10.229.193.9 with SMTP id ds9mr609690qcb.124.1274495892396; Fri, 21 May 2010 19:38:12 -0700 (PDT) Received: by 10.229.57.80 with HTTP; Fri, 21 May 2010 19:38:12 -0700 (PDT) Date: Fri, 21 May 2010 19:38:12 -0700 Message-ID: Subject: tasktracker JMX query From: Ted Yu To: general@hadoop.apache.org Content-Type: multipart/alternative; boundary=0016363b8240ef1c87048725b291 X-Virus-Checked: Checked by ClamAV on apache.org --0016363b8240ef1c87048725b291 Content-Type: text/plain; charset=ISO-8859-1 Hi, We monitor number of open connections to task tracker: public static IMonitorQuery RPC_NUM_OPEN_CONNECTIONS = new JmxQuery("", HADOOP_TASKTRACKER_WILDCARD(), "NumOpenConnections", ReportType.PERIODIC, RPC_STATISTICS_QUERY); The above worked with 0.19.1 hadoop but when it doesn't work with 0.20.1: INFO [2010-05-21 19:26:06] (ExecUtil.java:232) - Exception in thread "agentQueryingTimer" java.lang.IllegalStateException: no object name for wildcard name 'hadoop.dfs:service=TaskTracker,*' found at service:jmx:rmi:///jndi/rmi://sjc9-flash-grid01.ciq.com:11004/jmxrmi I am wondering how we should query against 0.20.1 Thanks --0016363b8240ef1c87048725b291--