Return-Path: Delivered-To: apmail-hadoop-zookeeper-user-archive@minotaur.apache.org Received: (qmail 79379 invoked from network); 28 Apr 2010 00:17:34 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 28 Apr 2010 00:17:34 -0000 Received: (qmail 63627 invoked by uid 500); 28 Apr 2010 00:17:34 -0000 Delivered-To: apmail-hadoop-zookeeper-user-archive@hadoop.apache.org Received: (qmail 63579 invoked by uid 500); 28 Apr 2010 00:17:34 -0000 Mailing-List: contact zookeeper-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: zookeeper-user@hadoop.apache.org Delivered-To: mailing list zookeeper-user@hadoop.apache.org Received: (qmail 63570 invoked by uid 99); 28 Apr 2010 00:17:34 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 28 Apr 2010 00:17:34 +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 X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of lzvoyager@gmail.com designates 209.85.221.193 as permitted sender) Received: from [209.85.221.193] (HELO mail-qy0-f193.google.com) (209.85.221.193) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 28 Apr 2010 00:17:27 +0000 Received: by qyk31 with SMTP id 31so19579230qyk.20 for ; Tue, 27 Apr 2010 17:17:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=lYEdVaAaa8i6Q92bzHjK/OEBta8AXkRFtd4Jvh5Enm8=; b=JTJL3Y0VMhTxcM0ReNmumkgkpwT2wzklEPLCtSBYslyXKZd24YEIu4Q6EEQXzcpsiz ncXvi9M225E8xXKA8QY3vOWB69MQpQiA7ZurgN+gIE6kBE9J7FGTBAt/1Jv5LWFzclrh q5hZ1KcJWjEKrf75K98y8Zxzq3ygo+DL59QJA= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=hjmh2tXwNKkvZBPNo0RQvoQYLmIuZ0c47LZU+KXIJmU1RmbGrN6z1MU0cKR6SZV/+n SzS+u7snWunhWHL+7tz/Aoz4ifc15BrFbV2qZJZY5qToTtqYN81KxO9Xi2MlMX4nA5/p cYR7jBn55J1A/ryK1j0W8JlcbWp+4CLVgP9IU= MIME-Version: 1.0 Received: by 10.224.97.66 with SMTP id k2mr2006772qan.246.1272413826832; Tue, 27 Apr 2010 17:17:06 -0700 (PDT) Received: by 10.224.54.136 with HTTP; Tue, 27 Apr 2010 17:17:06 -0700 (PDT) In-Reply-To: <4BD77075.7070603@apache.org> References: <4BD77075.7070603@apache.org> Date: Tue, 27 Apr 2010 17:17:06 -0700 Message-ID: Subject: Re: Bizarre ZooKeeper Client Behaviour From: Lei Zhang To: zookeeper-user@hadoop.apache.org Cc: Satish Bhatti Content-Type: multipart/alternative; boundary=00c09f905d4127dbb8048540ee1d --00c09f905d4127dbb8048540ee1d Content-Type: text/plain; charset=ISO-8859-1 Sorry for hijacking this thread. By default the server will only allow 10 sessions to be active from a > particular client (ip), perhaps you hit this and it triggered the storm? > > I am very surprise to hear about this limit. Our system has a number of daemons using zookeeper service, each daemon maintaining a zk session. I am in the process of changing to each thread of each daemon maintaining a zk session. That means we will hit this 10 session limit very easily. Patrick - what is the rationale for this 10 session limit? Thanks, Lei --00c09f905d4127dbb8048540ee1d--