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https://issues.apache.org/jira/browse/ZOOKEEPER-2230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Deepesh Reja updated ZOOKEEPER-2230:
------------------------------------
Comment: was deleted
(was: For every connection to the server, a new ZooKeeperSaslServer is
instantiated and when we use native GSSAPI, the credentials are added to the
subject's private credential set. These credentials are nothing but credentials
of server principal and for every connection it remains the same because
servicePrincipalName and serviceHostName doesn't change. The private credential
set allows addition of same object to the set because equals() method of
GSSCredential doesn't adhere to the RFC and returns False unless both objects
are same.
The patch checks if there is no credential in the private credential set, the
credential is added to the set otherwise not.
References:
http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/8u40-b25/sun/security/jgss/GSSCredentialImpl.java#GSSCredentialImpl.equals%28java.lang.Object%29
http://stackoverflow.com/questions/10285421/java-gssapi-compare-two-gsscredential-instances
)
> 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
> 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
>
>
> 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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