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zookeeper 3.4.6 unable to start by replacing reload4j jar directly into binary.

See original GitHub issue

Our customer has concerns about the log4j vulnerabilities, we ran an activity and replaced all the log4j occurrences with the reload4j and those are working fine. But unfortunately we’ve some components like ( elastic-search/zookeeper/logstash ) and their binaries are using the log4j-1.2.16/17 rev. (zookeeper) and log4j-core-2.16.x/log4j-core-2.11.x (elastic-search/logstash). We successfully upgraded the elastic-search/logstash log4j version to log4j-core-2.17.1 ( by placing the higher version jars ) in lib directory but when we tried the same with zookeeper by replacing the log4j-1.2.16 with reload4j directly in lib and starts the zookeeper it throws the following exception:

tail: /var/seamless/log/zookeeper/init.out: file truncated Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/log4j/jmx/HierarchyDynamicMBean at org.apache.zookeeper.jmx.ManagedUtil.registerLog4jMBeans(ManagedUtil.java:50) at org.apache.zookeeper.server.ZooKeeperServerMain.initializeAndRun(ZooKeeperServerMain.java:74) at org.apache.zookeeper.server.ZooKeeperServerMain.main(ZooKeeperServerMain.java:52) at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:116) at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78) Caused by: java.lang.ClassNotFoundException: org.apache.log4j.jmx.HierarchyDynamicMBean at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 5 more

reload4j doesn’t include the HierarchyDynamicMBean.class which causing this issue. Can someone please guide how we can fix this?

Thanks

Issue Analytics

State:
Created 2 years ago
Comments:5 (1 by maintainers)

Top GitHub Comments

5reactions

123Haynescommented, Mar 9, 2022

@muneebamjad you can try setting the system property zookeeper.jmx.log4j.disable to true .
That way zookeeper won’t try to register those mbeans.

See here for the relevant docs: https://github.com/apache/zookeeper/blob/master/zookeeper-docs/src/main/resources/markdown/zookeeperJMX.md#log4j-mbeans-deprecated

0reactions

muneebamjadcommented, Mar 9, 2022

@123Haynes for the comment you added. I tried and it worked with the latest reload4j (1.2.19) . I’m closing this ticket with this comment. Thanks Haynes for your time and guiding us. Much appreciated

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