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From "Deepesh Reja (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-2230) Connections fo ZooKeeper server becomes slow over time with native GSSAPI
Date Thu, 15 Dec 2016 12:16:58 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15751226#comment-15751226
] 

Deepesh Reja commented on ZOOKEEPER-2230:
-----------------------------------------

[~fittey] I think you are seeing different behavior because of setting "storeKey" to true
which adds principal's key in the Subject's private credentials set. Due to this, there is
always an entry in the set.

I'll see if I can come up with something so that this also work when "storeKey" is set to
True.

Also, please let me know if you have something or need help on the patch you are working on.

> 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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