Return-Path: X-Original-To: apmail-hadoop-mapreduce-user-archive@minotaur.apache.org Delivered-To: apmail-hadoop-mapreduce-user-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 27CC6E529 for ; Fri, 28 Dec 2012 18:12:40 +0000 (UTC) Received: (qmail 98840 invoked by uid 500); 28 Dec 2012 18:12:35 -0000 Delivered-To: apmail-hadoop-mapreduce-user-archive@hadoop.apache.org Received: (qmail 98684 invoked by uid 500); 28 Dec 2012 18:12:35 -0000 Mailing-List: contact user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@hadoop.apache.org Delivered-To: mailing list user@hadoop.apache.org Delivered-To: moderator for user@hadoop.apache.org Received: (qmail 38969 invoked by uid 99); 28 Dec 2012 08:33:54 -0000 X-ASF-Spam-Status: No, hits=1.5 required=5.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of kshivakps@gmail.com designates 209.85.215.54 as permitted sender) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=4ckBuWk+WMdAuTZJPmm2dgW5xf/Ho5sX+cs6GzfBlQA=; b=dJX1InC5pqkUs/OJBeAYGqzzh0IbHgdtjI6iT88Z2crpqt3pvVlUR6zWcfx9EaT8po UEpDnr/Um+K5VIKPvc07hrT3SjzZAVjSs5VNeu/bgvHxiFZ7Og18rylJ0edCb5mak3NI 2+gb2Hq20jQ/Dfta4YMdEwnRe1w6C0EcDPgnr8iGsIftdU+mmQ7jMniLOC+cRdMTW6rg fMbmeXMVMiWkLFM6zGdZWVzfm7/4QQcBWERtDfFg4kTc7+sr3tapihfpQXgjtg17ExeD E84boLSqxvmWEIYn/W6+d9cQE5/6flsgDlJDlIOiHXm94O18yMXJlL3JzYtgHV4GXf62 eehQ== MIME-Version: 1.0 Date: Fri, 28 Dec 2012 14:03:26 +0530 Message-ID: Subject: What is the difference between a failed task attempt and a killed task attempt? From: Kshiva Kps To: user@hadoop.apache.org Content-Type: multipart/alternative; boundary=f46d0401678f72520d04d1e5848e X-Virus-Checked: Checked by ClamAV on apache.org --f46d0401678f72520d04d1e5848e Content-Type: text/plain; charset=ISO-8859-1 What is the difference between a failed task attempt and a killed task attempt? *A. *A failed task attempt is a task attempt that threw an unhandled exception. A killed task attempt is one that was terminated by the JobTracker. * * *B. *A failed task attempt is a task attempt that did not generate any key value pairs. A killed task attempt is a task attempt that threw an exception, and thus killed by the execution framework. * * *C. *A failed task attempt is a task attempt that completed, but with an unexpected status value. A killed task attempt is a duplicate copy of a task attempt that was started as part of speculative execution. * * *D. *A failed task attempt is a task attempt that threw a RuntimeException (i.e., the task fails). A killed task attempt is a task attempt that threw any other type of exception (e.g., IOException); the execution framework catches these exceptions and reports them as killed. --f46d0401678f72520d04d1e5848e Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

=A0

What is the difference between a failed task attempt and a killed task attempt?

=A0

=A0

A.=A0 A failed t= ask attempt is a task attempt that threw an unhandled exception. A killed task attempt is on= e that was terminated by the JobTracker.

=A0

B.=A0 A failed t= ask attempt is a task attempt that did not generate any key value pairs. A killed task attem= pt is a task attempt that threw an exception, and thus killed by the execution framework.

=A0

C.=A0 = A failed task att= empt is a task attempt that completed, but with an unexpected status value. A killed task attempt is a duplicate copy of a = task attempt that was started as part of speculative execution.

=A0

D.=A0 <= /span>A failed task atte= mpt is a task attempt that threw a RuntimeException (i.e., the task fails). A killed task attempt is a task attempt that threw any other type of exception (e.g., IOException); the execution framework catches these exceptions and reports them as killed.





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