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Date: Thu, 9 Feb 2017 17:55:42 +0000 (UTC)
From: "Yan Fitterer (JIRA)" <jira@apache.org>
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Message-ID: <JIRA.12842215.1435817600000.40656.1486662942158@Atlassian.JIRA>
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Subject: [jira] [Commented] (ZOOKEEPER-2230) Connections fo ZooKeeper server
 becomes slow over time with native GSSAPI
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archived-at: Thu, 09 Feb 2017 17:55:48 -0000


    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15859905#comment-15859905 ] 

Yan Fitterer commented on ZOOKEEPER-2230:
-----------------------------------------

[~deepeshreja] See my change in the PR above. That patch works for us, and I'm hoping it's good for all. If folks are happy with merging this, I will do an equivalent patch on the 3.5 branch, and master. When I last looked, 3.5 had the same issue.

> Connections fo ZooKeeper server becomes slow over time with native GSSAPI
> -------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-2230
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2230
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 3.4.6, 3.4.7, 3.4.8, 3.5.0
>         Environment: OS: RHEL6
> Java: 1.8.0_40
> Configuration:
> java.env:
> {noformat}
> SERVER_JVMFLAGS="$SERVER_JVMFLAGS -Xmx5120m"
> SERVER_JVMFLAGS="$SERVER_JVMFLAGS -Djava.security.auth.login.config=/local/apps/zookeeper-test1/conf/jaas-server.conf"
> SERVER_JVMFLAGS="$SERVER_JVMFLAGS -Dsun.security.jgss.native=true"
> {noformat}
> jaas-server.conf:
> {noformat}
> Server {
>     com.sun.security.auth.module.Krb5LoginModule required
>     useKeyTab=true
>     isInitiator=false
>     principal="zookeeper/<hostname>@<REALM>";
> };
> {noformat}
> Process environment:
> {noformat}
> KRB5_KTNAME=/local/apps/zookeeper-test1/conf/keytab
> ZOO_LOG_DIR=/local/apps/zookeeper-test1/log
> ZOOCFGDIR=/local/apps/zookeeper-test1/conf
> {noformat}
>            Reporter: Deepesh Reja
>            Assignee: Enis Soztutar
>              Labels: patch
>             Fix For: 3.4.6, 3.4.7, 3.4.8, 3.5.2
>
>         Attachments: ZOOKEEPER-2230.patch
>
>
> ZooKeeper server becomes slow over time when native GSSAPI is used. The connection to the server starts taking upto 10 seconds.
> This is happening with ZooKeeper-3.4.6 and is fairly reproducible.
> Debug logs:
> {noformat}
> 2015-07-02 00:58:49,318 [myid:] - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:NIOServerCnxnFactory@197] - Accepted socket connection from /<client_ip>:47942
> 2015-07-02 00:58:49,318 [myid:] - DEBUG [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:ZooKeeperSaslServer@78] - serviceHostname is '<zookeeper-server>'
> 2015-07-02 00:58:49,318 [myid:] - DEBUG [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:ZooKeeperSaslServer@79] - servicePrincipalName is 'zookeeper'
> 2015-07-02 00:58:49,318 [myid:] - DEBUG [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:ZooKeeperSaslServer@80] - SASL mechanism(mech) is 'GSSAPI'
> 2015-07-02 00:58:49,324 [myid:] - DEBUG [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:ZooKeeperSaslServer@106] - Added private credential to subject: [GSSCredential: 
> zookeeper@<zookeeper-server> 1.2.840.113554.1.2.2 Accept [class sun.security.jgss.wrapper.GSSCredElement]]
> 2015-07-02 00:58:59,441 [myid:] - DEBUG [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:ZooKeeperServer@810] - Session establishment request from client /<client_ip>:47942 client's lastZxid is 0x0
> 2015-07-02 00:58:59,441 [myid:] - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:ZooKeeperServer@868] - Client attempting to establish new session at /<client_ip>:47942
> 2015-07-02 00:58:59,448 [myid:] - DEBUG [SyncThread:0:FinalRequestProcessor@88] - Processing request:: sessionid:0x14e486028785c81 type:createSession cxid:0x0 zxid:0x110e79 txntype:-10 reqpath:n/a
> 2015-07-02 00:58:59,448 [myid:] - DEBUG [SyncThread:0:FinalRequestProcessor@160] - sessionid:0x14e486028785c81 type:createSession cxid:0x0 zxid:0x110e79 txntype:-10 reqpath:n/a
> 2015-07-02 00:58:59,448 [myid:] - INFO  [SyncThread:0:ZooKeeperServer@617] - Established session 0x14e486028785c81 with negotiated timeout 10000 for client /<client_ip>:47942
> 2015-07-02 00:58:59,452 [myid:] - DEBUG [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:ZooKeeperServer@949] - Responding to client SASL token.
> 2015-07-02 00:58:59,452 [myid:] - DEBUG [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:ZooKeeperServer@953] - Size of client SASL token: 706
> 2015-07-02 00:58:59,460 [myid:] - DEBUG [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:ZooKeeperServer@984] - Size of server SASL response: 161
> 2015-07-02 00:58:59,462 [myid:] - DEBUG [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:ZooKeeperServer@949] - Responding to client SASL token.
> 2015-07-02 00:58:59,462 [myid:] - DEBUG [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:ZooKeeperServer@953] - Size of client SASL token: 0
> 2015-07-02 00:58:59,462 [myid:] - DEBUG [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:ZooKeeperServer@984] - Size of server SASL response: 32
> 2015-07-02 00:58:59,463 [myid:] - DEBUG [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:ZooKeeperServer@949] - Responding to client SASL token.
> 2015-07-02 00:58:59,463 [myid:] - DEBUG [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:ZooKeeperServer@953] - Size of client SASL token: 32
> 2015-07-02 00:58:59,464 [myid:] - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:SaslServerCallbackHandler@118] - Successfully authenticated client: authenticationID=<user_principal>;  authorizationID=<user_principal>.
> 2015-07-02 00:58:59,464 [myid:] - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:ZooKeeperServer@964] - adding SASL authorization for authorizationID: <user_principal>
> 2015-07-02 00:58:59,465 [myid:] - INFO  [ProcessThread(sid:0 cport:-1)::PrepRequestProcessor@494] - Processed session termination for sessionid: 0x14e486028785c81
> 2015-07-02 00:58:59,467 [myid:] - DEBUG [SyncThread:0:FinalRequestProcessor@88] - Processing request:: sessionid:0x14e486028785c81 type:closeSession cxid:0x1 zxid:0x110e7a txntype:-11 reqpath:n/a
> 2015-07-02 00:58:59,467 [myid:] - DEBUG [SyncThread:0:FinalRequestProcessor@160] - sessionid:0x14e486028785c81 type:closeSession cxid:0x1 zxid:0x110e7a txntype:-11 reqpath:n/a
> 2015-07-02 00:58:59,467 [myid:] - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:42405:NIOServerCnxn@1007] - Closed socket connection for client /<client_ip>:47942 which had sessionid 0x14e486028785c81
> {noformat}
> If you see, after adding the credentials to privateCredential set, it takes roughly 10 seconds to reach to session establishment request. From the code it looks like Subject.doAs() is taking a lot of time.
> I connected it to jdb while it was waiting and got following stacktrace:
> {noformat}
> NIOServerCxn.Factory:0.0.0.0/0.0.0.0:58909:
>   [1] java.util.HashMap$TreeNode.find (HashMap.java:1,865)
>   [2] java.util.HashMap$TreeNode.find (HashMap.java:1,861)
>   [3] java.util.HashMap$TreeNode.find (HashMap.java:1,861)
>   [4] java.util.HashMap$TreeNode.find (HashMap.java:1,861)
>   [5] java.util.HashMap$TreeNode.find (HashMap.java:1,861)
>   [6] java.util.HashMap$TreeNode.find (HashMap.java:1,861)
>   [7] java.util.HashMap$TreeNode.find (HashMap.java:1,861)
>   [8] java.util.HashMap$TreeNode.putTreeVal (HashMap.java:1,981)
>   [9] java.util.HashMap.putVal (HashMap.java:637)
>   [10] java.util.HashMap.put (HashMap.java:611)
>   [11] java.util.HashSet.add (HashSet.java:219)
>   [12] javax.security.auth.Subject$ClassSet.populateSet (Subject.java:1,418)
>   [13] javax.security.auth.Subject$ClassSet.<init> (Subject.java:1,372)
>   [14] javax.security.auth.Subject.getPrivateCredentials (Subject.java:767)
>   [15] sun.security.jgss.GSSUtil$1.run (GSSUtil.java:340)
>   [16] sun.security.jgss.GSSUtil$1.run (GSSUtil.java:332)
>   [17] java.security.AccessController.doPrivileged (native method)
>   [18] sun.security.jgss.GSSUtil.searchSubject (GSSUtil.java:332)
>   [19] sun.security.jgss.wrapper.NativeGSSFactory.getCredFromSubject (NativeGSSFactory.java:53)
>   [20] sun.security.jgss.wrapper.NativeGSSFactory.getCredentialElement (NativeGSSFactory.java:116)
>   [21] sun.security.jgss.GSSManagerImpl.getCredentialElement (GSSManagerImpl.java:193)
>   [22] sun.security.jgss.GSSCredentialImpl.add (GSSCredentialImpl.java:427)
>   [23] sun.security.jgss.GSSCredentialImpl.<init> (GSSCredentialImpl.java:62)
>   [24] sun.security.jgss.GSSManagerImpl.createCredential (GSSManagerImpl.java:154)
>   [25] com.sun.security.sasl.gsskerb.GssKrb5Server.<init> (GssKrb5Server.java:108)
>   [26] com.sun.security.sasl.gsskerb.FactoryImpl.createSaslServer (FactoryImpl.java:85)
>   [27] javax.security.sasl.Sasl.createSaslServer (Sasl.java:524)
>   [28] org.apache.zookeeper.server.ZooKeeperSaslServer$1.run (ZooKeeperSaslServer.java:118)
>   [29] org.apache.zookeeper.server.ZooKeeperSaslServer$1.run (ZooKeeperSaslServer.java:114)
>   [30] java.security.AccessController.doPrivileged (native method)
>   [31] javax.security.auth.Subject.doAs (Subject.java:422)
>   [32] org.apache.zookeeper.server.ZooKeeperSaslServer.createSaslServer (ZooKeeperSaslServer.java:114)
>   [33] org.apache.zookeeper.server.ZooKeeperSaslServer.<init> (ZooKeeperSaslServer.java:48)
>   [34] org.apache.zookeeper.server.NIOServerCnxn.<init> (NIOServerCnxn.java:100)
>   [35] org.apache.zookeeper.server.NIOServerCnxnFactory.createConnection (NIOServerCnxnFactory.java:161)
>   [36] org.apache.zookeeper.server.NIOServerCnxnFactory.run (NIOServerCnxnFactory.java:202)
>   [37] java.lang.Thread.run (Thread.java:745)
> {noformat}
> This doesn't happen when we use JGSS, I think because adding credential to privateCredential set for every connection is causing Subject.doAS() to take much longer time.


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