Ethan Li created STORM-2838: ------------------------------- Summary: Replace log4j-over-slf4j with log4j-1.2-api Key: STORM-2838 URL: https://issues.apache.org/jira/browse/STORM-2838 Project: Apache Storm Issue Type: Improvement Reporter: Ethan Li Assignee: Ethan Li
I tried to setup HdfsBlobStore and an exception shows up when I launch the nimbus. {code:java} Detected both log4j-over-slf4j.jar AND slf4j-log4j12.jar on the class path, preempting StackOverflowError. {code} Found an explanation: https://www.slf4j.org/codes.html#log4jDelegationLoop This is because storm and hadoop use different logging system: Storm: log4j-over-slf4j --> slf4j --> log4j2 or slf4j --> log4j2 Hadoop: slf4j --> log4j1.2 or log4j1.2 (directly) (note: --> means redirecting) When we add hadoop common lib classpath to nimbus, log4j-over-slf4j.jar and slf4j-log4j12.jar coexist. One way to let storm work with hadoop is to replace log4j-over-slf4j in storm with log4j1.2. -- This message was sent by Atlassian JIRA (v6.4.14#64029)