cos-boot - ZooKeeperServer fails to start on clientPort due to java.lang.NullPointerException or Bad file descriptor

(Doc ID 2043605.1)

Last updated on JUNE 29, 2017

Applies to:

Oracle WebCenter Sites - Version 7.6.2 to 7.6.2 [Release FatWire]
Information in this document applies to any platform.


Normally when ZooKeeperServer is successfully started, in cos-boot.log, you will see messages like these:



User might have manually modified the dataDir used by zookeeper, and caused corruption with the files inside dataDir. Or, if there was a FS issue with where dataDir is located.

NOTE: clientPort and dataDir are defined in cos-boot/WEB-INF/classes/ By default dataDir is set to {COS_HOME}/data.


Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms