From issues-return-18437-archive-asf-public=cust-asf.ponee.io@hawq.incubator.apache.org Fri Jun 1 02:11:04 2018 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 143EF180677 for ; Fri, 1 Jun 2018 02:11:03 +0200 (CEST) Received: (qmail 32505 invoked by uid 500); 1 Jun 2018 00:11:03 -0000 Mailing-List: contact issues-help@hawq.incubator.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@hawq.incubator.apache.org Delivered-To: mailing list issues@hawq.incubator.apache.org Received: (qmail 32496 invoked by uid 99); 1 Jun 2018 00:11:03 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd1-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 01 Jun 2018 00:11:03 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd1-us-west.apache.org (ASF Mail Server at spamd1-us-west.apache.org) with ESMTP id 95509C0832 for ; Fri, 1 Jun 2018 00:11:02 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -109.501 X-Spam-Level: X-Spam-Status: No, score=-109.501 tagged_above=-999 required=6.31 tests=[ENV_AND_HDR_SPF_MATCH=-0.5, KAM_ASCII_DIVIDERS=0.8, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, USER_IN_DEF_SPF_WL=-7.5, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-us.apache.org ([10.40.0.8]) by localhost (spamd1-us-west.apache.org [10.40.0.7]) (amavisd-new, port 10024) with ESMTP id KRGpJq71yOTH for ; Fri, 1 Jun 2018 00:11:01 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-us.apache.org (ASF Mail Server at mx1-lw-us.apache.org) with ESMTP id 652B05FDFF for ; Fri, 1 Jun 2018 00:11:01 +0000 (UTC) Received: from jira-lw-us.apache.org (unknown [207.244.88.139]) by mailrelay1-us-west.apache.org (ASF Mail Server at mailrelay1-us-west.apache.org) with ESMTP id B49D1E0239 for ; Fri, 1 Jun 2018 00:11:00 +0000 (UTC) Received: from jira-lw-us.apache.org (localhost [127.0.0.1]) by jira-lw-us.apache.org (ASF Mail Server at jira-lw-us.apache.org) with ESMTP id 281AB21096 for ; Fri, 1 Jun 2018 00:11:00 +0000 (UTC) Date: Fri, 1 Jun 2018 00:11:00 +0000 (UTC) From: "Alexander Denissov (JIRA)" To: issues@hawq.incubator.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HAWQ-1622) Cache PXF proxy UGI so that cleanup of FileSystem cache does't have to be done on each request MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/HAWQ-1622?page=3Dcom.atlassian= .jira.plugin.system.issuetabpanels:all-tabpanel ] Alexander Denissov updated HAWQ-1622: ------------------------------------- Component/s: PXF > Cache PXF proxy UGI so that cleanup of FileSystem cache does't have to be= done on each request > -------------------------------------------------------------------------= --------------------- > > Key: HAWQ-1622 > URL: https://issues.apache.org/jira/browse/HAWQ-1622 > Project: Apache HAWQ > Issue Type: Improvement > Components: PXF > Reporter: Alexander Denissov > Assignee: Radar Lei > Priority: Major > > Closing PXF proxy UGIs on each request (implemented in HAWQ-1621) slows d= own PXF request response time significantly when several threads work concu= rrently as it locks FileSystem cache and holds the lock while the cleanup o= f DFSClients is completed. > This can be avoided by caching the proxy UGI for a given proxy user betwe= en requests. Care must be taken to remove the cached entry after some pre-d= efined TTL if and only if there are no current threads using any FileSystem= entries held by the cache. A combination of TTL-based cache with ref-count= ing might be utilized to achieve this. > =C2=A0 > For some example of this, see:=C2=A0 > https://github.com/apache/oozie/blob/master/core/src/main/java/org/apache= /oozie/service/UserGroupInformationService.java > Caching UGIs might be tricky when Kerberos support is implemented later, = see:=C2=A0https://issues.apache.org/jira/browse/HIVE-3098?focusedCommentId= =3D13398979&page=3Dcom.atlassian.jira.plugin.system.issuetabpanels%3Acommen= t-tabpanel#comment-13398979 -- This message was sent by Atlassian JIRA (v7.6.3#76005)