Re: No JAAS configuration section named 'Server' was found in '/opt/zookeeper/conf/jaas_server.conf'

Sun, 09 Mar 2025 17:01:41 -0700 

I should mention that I'm using zookeeper version 3.9.3

On 09/03/2025 23:57, Pearson wrote:


Hello,
I'm very new to Zookeeper, and even after reading a bunch of threads and forum posts I am unable to solve this problem. Would really appreciate your help. 

Let me begin with my zoo.cfg:

|cat /opt/zookeeper/conf/zoo.cgf|

|dataDir=/var/lib/zookeeper
dataLogDir=/var/log/zookeeper

clientPort=2181

initLimit=5
syncLimit=2

# Configure SASL authentication from Clients
authProvider.1=org.apache.zookeeper.server.auth.SASLAuthenticationProvider
|

|clientCnxnSocket=org.apache.zookeeper.ClientCnxnSocketNetty
serverCnxnFactory=org.apache.zookeeper.server.NettyServerCnxnFactory|

|# Configure SASL for Quorun
# Reference: https://cwiki.apache.org/confluence/display/ZOOKEEPER/Server-Server+mutual+authentication 
quorum.auth.enableSasl=true
quorum.auth.learnerRequireSasl=true
quorum.auth.serverRequireSasl=true
quorum.auth.learner.saslLoginContext=QuorumLearner
quorum.auth.server.saslLoginContext=QuorumServer
# quorum.auth.kerberos.servicePrincipal=servicename/_HOST
quorum.cnxn.threads.size=20

autopurge.snapRetainCount=3
autopurge.purgeInterval=1

# Clients
server.1=192.168.122.121:2888:3888
server.2=192.168.122.122:2888:3888
server.3=192.168.122.123:2888:3888|


This is my jaas_server.conf:

|cat /opt/zookeeper/conf/jaas_server.conf|
|# Reference: https://github.com/symat/zookeeper-docker-test/blob/master/conf/digest_jaas.conf 
# Reference: https://issues.apache.org/jira/browse/ZOOKEEPER-3743
Server {
    org.apache.zookeeper.server.auth.DigestLoginModule required
    user_zookeeper="test";  # Or use a different user/password as needed
};
# This section is for ZooKeeper servers (QuorumServers) to authenticate
QuorumServer {
    org.apache.zookeeper.server.auth.DigestLoginModule required
    user_zookeeper="test";
};
# This section is for Quorum Learners to authenticate
QuorumLearner {
    org.apache.zookeeper.server.auth.DigestLoginModule required
    username="zookeeper"
    password="test";
};|


And this is my jaas_client.conf:

|cat /opt/zookeeper/conf/jaas_client.conf
# Reference: https://issues.apache.org/jira/browse/ZOOKEEPER-3743

# This section is for ZooKeeper clients to authenticate
Client {
    org.apache.zookeeper.server.auth.DigestLoginModule required
    username="zookeeper"
    password="test";  # Use the correct client credentials here
};|


Next, my java.env:

|cat /opt/zookeeper/conf/java.env|
|# Reference: https://cwiki.apache.org/confluence/display/ZOOKEEPER/Client-Server+mutual+authentication 
# Reference: https://issues.apache.org/jira/browse/ZOOKEEPER-3743

# Defining your server side JAAS config file path:
SERVER_JVMFLAGS="-Djava.security.auth.login.config=/opt/zookeeper/conf/jaas_server.conf"

# REQUIRED SASL RELATED CONFIGS:
# ==== java.security.auth.login.config:
# Defining your client side JAAS config file path:
CLIENT_JVMFLAGS="${CLIENT_JVMFLAGS} -Djava.security.auth.login.config=/opt/zookeeper/conf/jaas_client.conf" 

# OPTIONAL SASL RELATED CONFIGS:

# ==== zookeeper.sasl.client:
# You can disable SASL authentication on the client side (it is true by default): 
CLIENT_JVMFLAGS="${CLIENT_JVMFLAGS} -Dzookeeper.sasl.client=true"|


Finally, my zookeeper.service:

|cat /etc/systemd/system/zookeeper.service|

|[Unit]
Description=Zookeeper Server
After=network.target

[Service]
User=zookeeper
Group=zookeeper
Type=forking
EnvironmentFile=/opt/zookeeper/conf/java.env
ExecStart=/opt/zookeeper/bin/zkServer.sh start
ExecStop=/opt/zookeeper/bin/zkServer.sh stop
ExecReload=/opt/zookeeper/bin/zkServer.sh restart
Restart=on-failure

[Install]
WantedBy=multi-user.target|


Coming to the error I see:
|2025-03-09 19:22:12,539 [myid:1] - ERROR [main:o.a.z.s.ServerCnxnFactory@267] - No JAAS configuration section named 'Server' was found in '/opt/zookeeper/conf/jaas_server.conf'. 2025-03-09 19:22:12,541 [myid:1] - ERROR [main:o.a.z.s.q.QuorumPeerMain@114] - Unexpected exception, exiting abnormally java.io.IOException: No JAAS configuration section named 'Server' was found in '/opt/zookeeper/conf/jaas_server.conf'.         at org.apache.zookeeper.server.ServerCnxnFactory.configureSaslLogin(ServerCnxnFactory.java:268)         at org.apache.zookeeper.server.NIOServerCnxnFactory.configure(NIOServerCnxnFactory.java:623)         at org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:169)         at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:137)         at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:91) 2025-03-09 19:22:12,542 [myid:1] - INFO [main:o.a.z.a.ZKAuditProvider@42] - ZooKeeper audit is disabled. 2025-03-09 19:22:12,543 [myid:1] - ERROR [main:o.a.z.u.ServiceUtils@48] - Exiting JVM with code 1|
I have looked at many forum posts - the config I posted above is directly from Mate Szalay-Beko's Github repo: https://github.com/symat/zookeeper-docker-test/blob/master/conf/digest_jaas.conf
Please tell me what I need to do to fix this. I have checked the permissions to the files, necessary ports are open and everything has been |chown|ed to the zookeeper user and group. 

Thank you for your help.

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