# Logstash java class error

**URL:** <https://discuss.elastic.co/t/logstash-java-class-error/227644>\
**Category:** Logstash\
**Created:** [April 12, 2020, 4:14am UTC](https://discuss.elastic.co/t/logstash-java-class-error/227644 "2020-04-12T04:14:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Krish\_Na](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/krish_na/32/65677_2.png) [@Krish\_Na](https://discuss.elastic.co/u/Krish_Na)\
**Post date:** [April 12, 2020, 4:14am UTC](https://discuss.elastic.co/t/logstash-java-class-error/227644/1 "2020-04-12T04:14:01Z")

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Hi Gurus,

## Its been crazy Easter days for me, I tried installing ELK and JDK 14. Elasticsearch is working fine however when I try to run logbash.bat I am getting below error

## Java HotSpot(TM) 64-Bit Server VM warning: Ignoring option UseConcMarkSweepGC; support was removed in 14.0 Java HotSpot(TM) 64-Bit Server VM warning: Ignoring option CMSInitiatingOccupancyFraction; support was removed in 14.0 Java HotSpot(TM) 64-Bit Server VM warning: Ignoring option UseCMSInitiatingOccupancyOnly; support was removed in 14.0 Error: Could not find or load main class 7.6\logstash-7.6.2\logstash-7.6.2\logstash-core\lib\jars\animal-sniffer-annotations-1.14.jar;C:\softwares\ELK Caused by: java.lang.ClassNotFoundException: 7/6\logstash-7/6/2\logstash-7/6/2\logstash-core\lib\jars\animal-sniffer-annotations-1/14/jar;C:\softwares\ELK

I have put my CLASS PATH as  
C:\Program Files\Java\jdk-14\lib\*.jar

Java\_Home as  
C:\Program Files\Java\jdk-14

path as  
C:\softwares\ELK 7.6\logstash-7.6.2\logstash-7.6.2\bin;  
C:\Program Files\Java\jdk-14\bin;

Not sure, why I am getting error while runing logstash.bat..

can you please help me out ???

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<div class="post-metadata">

**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\
**Post date:** [April 12, 2020, 8:22am UTC](https://discuss.elastic.co/t/logstash-java-class-error/227644/2 "2020-04-12T08:22:06Z")

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According to [the official support matrix](https://www.elastic.co/support/matrix#matrix_jvm) it looks like Elasticsearch currently only supports Java13 and Logstash is limited to Java11.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [May 10, 2020, 8:37am UTC](https://discuss.elastic.co/t/logstash-java-class-error/227644/3 "2020-05-10T08:37:05Z")

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