# Error in Elasticsearch After upgrading from 5.6 - 6.4

**URL:** <https://discuss.elastic.co/t/error-in-elasticsearch-after-upgrading-from-5-6-6-4/159806>\
**Category:** Elasticsearch\
**Created:** [December 6, 2018, 9:12pm UTC](https://discuss.elastic.co/t/error-in-elasticsearch-after-upgrading-from-5-6-6-4/159806 "2018-12-06T21:12:22Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Anam1](https://avatars.discourse-cdn.com/v4/letter/a/8baadc/32.png) [@Anam1](https://discuss.elastic.co/u/Anam1)\
**Post date:** [December 6, 2018, 9:12pm UTC](https://discuss.elastic.co/t/error-in-elasticsearch-after-upgrading-from-5-6-6-4/159806/1 "2018-12-06T21:12:22Z")

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After I upgrade ELK stack from 5.6 to 6.4 I am getting an error in Elasticsearch.

Dec 06 12:00:47 logstash-sf elasticsearch[24855]: at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:294)  
Dec 06 12:00:47 logstash-sf elasticsearch[24855]: at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136)  
Dec 06 12:00:47 logstash-sf elasticsearch[24855]: at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:127)  
Dec 06 12:00:47 logstash-sf elasticsearch[24855]: at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86)  
Dec 06 12:00:47 logstash-sf elasticsearch[24855]: at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124)  
Dec 06 12:00:47 logstash-sf elasticsearch[24855]: at org.elasticsearch.cli.Command.main(Command.java:90)  
Dec 06 12:00:47 logstash-sf elasticsearch[24855]: at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93)  
Dec 06 12:00:47 logstash-sf elasticsearch[24855]: at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:86)  
Dec 06 12:00:47 logstash-sf elasticsearch[24855]: 2018-12-06 12:00:47,261 main ERROR Null object returned for RollingFile in Appenders.  
Dec 06 12:00:47 logstash-sf elasticsearch[24855]: 2018-12-06 12:00:47,262 main ERROR Unable to locate appender "audit\_rolling" for logger config "org.elasticsearch.xpack.security.audit.logfile.LoggingAudi

Please let me know to resolve this issue.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [January 3, 2019, 9:12pm UTC](https://discuss.elastic.co/t/error-in-elasticsearch-after-upgrading-from-5-6-6-4/159806/2 "2019-01-03T21:12:24Z")

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