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I have a 3 node zookeeper ensemble running from where I had trouble with one node showing a corrupt db. Now I found in the docs that it has to be cleared regularily with the help of cron running this command:

java -cp zookeeper.jar:log4j.jar:conf org.apache.zookeeper.server.PurgeTxnLog /var/lib/zookeeper/ /var/lib/zookeeper/version-2/ -n 3

Unfortunatelly I do get this error:

Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory at org.apache.zookeeper.server.PurgeTxnLog.(PurgeTxnLog.java:45) Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory 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) ... 1 more

What is causing this and how could I prevent zookeeper from corrupting the db again due to too many log entries?

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slf4j's jars are missing from classpath; you can add them manually, but it's better to use zkCleanup.sh (comes with zookeeper) instead.

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