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Chesnay Schepler updated FLINK-20404: ------------------------------------- Component/s: Build System > ZooKeeper quorum fails to start due to missing log4j library > ------------------------------------------------------------ > > Key: FLINK-20404 > URL: https://issues.apache.org/jira/browse/FLINK-20404 > Project: Flink > Issue Type: Bug > Components: Build System > Affects Versions: 1.11.2 > Reporter: Pedro Miguel Rainho Chaves > Priority: Blocker > Fix For: 1.12.0, 1.11.3 > > > Upon starting a zookeeper quorum using flink's bootstrapped zookeeper, it > throws the following exception. > > {code:java} > 2020-11-27 13:13:38,371 ERROR > org.apache.flink.runtime.zookeeper.FlinkZooKeeperQuorumPeer [] - Error > running ZooKeeper quorum peer: org/apache/log4j/jmx/HierarchyDynamicMBean > java.lang.NoClassDefFoundError: org/apache/log4j/jmx/HierarchyDynamicMBean > at > org.apache.flink.shaded.zookeeper3.org.apache.zookeeper.jmx.ManagedUtil.registerLog4jMBeans(ManagedUtil.java:51) > ~[flink-shaded-zookeeper-3.4.14.jar:3.4.14-11.0] > at > org.apache.flink.shaded.zookeeper3.org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:125) > ~[flink-shaded-zookeeper-3.4.14.jar:3.4.14-11.0] > at > org.apache.flink.runtime.zookeeper.FlinkZooKeeperQuorumPeer.runFlinkZkQuorumPeer(FlinkZooKeeperQuorumPeer.java:123) > ~[flink-dist_2.11-1.11.2.jar:1.11.2] > at > org.apache.flink.runtime.zookeeper.FlinkZooKeeperQuorumPeer.main(FlinkZooKeeperQuorumPeer.java:79) > [flink-dist_2.11-1.11.2.jar:1.11.2] > Caused by: java.lang.ClassNotFoundException: > org.apache.log4j.jmx.HierarchyDynamicMBean > at java.net.URLClassLoader.findClass(URLClassLoader.java:382) > ~[?:1.8.0_262] > at java.lang.ClassLoader.loadClass(ClassLoader.java:418) > ~[?:1.8.0_262] > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352) > ~[?:1.8.0_262] > at java.lang.ClassLoader.loadClass(ClassLoader.java:351) > ~[?:1.8.0_262] > ... 4 more > {code} > This happens because the new flink version is missing a log4j library. This > can be solved by adding log4j-1.2.17.jar to the classpath, nonetheless the > bootstrapped zookeepeer version should be compatible with the log4j2 > libraries that come with flink's default installation. > > *Steps to reproduce:* > # Fresh install of flink version 1.11.2 > # Change the zookeeper config to start as a quorum > {code:java} > server.1=<hostname>:2888:3888 > server.2=<hostname>:2888:3888{code} > # Start zookeeper > # <installation_path>/bin/zookeeper.sh start-foreground 1 -- This message was sent by Atlassian Jira (v8.3.4#803005)