# Logstash not starting giving error when I run the command logstash -f logstash.conf in my command prompt

**URL:** <https://discuss.elastic.co/t/logstash-not-starting-giving-error-when-i-run-the-command-logstash-f-logstash-conf-in-my-command-prompt/236809>\
**Category:** Logstash\
**Created:** [June 12, 2020, 4:10am UTC](https://discuss.elastic.co/t/logstash-not-starting-giving-error-when-i-run-the-command-logstash-f-logstash-conf-in-my-command-prompt/236809 "2020-06-12T04:10:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![TUSHAR\_Sinha](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/tushar_sinha/32/69782_2.png) [@TUSHAR\_Sinha](https://discuss.elastic.co/u/TUSHAR_Sinha)\
**Post date:** [June 12, 2020, 4:10am UTC](https://discuss.elastic.co/t/logstash-not-starting-giving-error-when-i-run-the-command-logstash-f-logstash-conf-in-my-command-prompt/236809/1 "2020-06-12T04:10:34Z")

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C:\elastic\_stack\logstash-7.7.1\logstash-7.7.1\bin\>logstash.bat -f logstash.conf

Exception in thread "main" java.lang.ExceptionInInitializerError  
at org.apache.logging.log4j.core.util.WatchManager.(WatchManager.java:53)  
at org.apache.logging.log4j.core.config.AbstractConfiguration.(AbstractConfiguration.java:135)  
at org.apache.logging.log4j.core.config.NullConfiguration.(NullConfiguration.java:32)  
at org.apache.logging.log4j.core.LoggerContext.(LoggerContext.java:85)  
at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.createContext(ClassLoaderContextSelector.java:179)  
at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.locateContext(ClassLoaderContextSelector.java:153)  
at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.getContext(ClassLoaderContextSelector.java:78)  
at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.getContext(ClassLoaderContextSelector.java:65)  
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:148)  
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)  
at org.apache.logging.log4j.LogManager.getContext(LogManager.java:194)  
at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:581)  
at org.logstash.Logstash.(Logstash.java:42)  
Caused by: java.lang.ArrayIndexOutOfBoundsException  
at java.lang.System.arraycopy(Native Method)  
at org.apache.logging.log4j.core.util.UuidUtil.(UuidUtil.java:81)  
... 13 more

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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:** [July 10, 2020, 4:10am UTC](https://discuss.elastic.co/t/logstash-not-starting-giving-error-when-i-run-the-command-logstash-f-logstash-conf-in-my-command-prompt/236809/2 "2020-07-10T04:10:35Z")

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