# Parse a Null Pointer Exception Logs in Logstash

**URL:** <https://discuss.elastic.co/t/parse-a-null-pointer-exception-logs-in-logstash/233058>\
**Category:** Logstash\
**Created:** [May 18, 2020, 8:06am UTC](https://discuss.elastic.co/t/parse-a-null-pointer-exception-logs-in-logstash/233058 "2020-05-18T08:06:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![shiv97](https://avatars.discourse-cdn.com/v4/letter/s/e8c25b/32.png) [@shiv97](https://discuss.elastic.co/u/shiv97)\
**Post date:** [May 18, 2020, 8:06am UTC](https://discuss.elastic.co/t/parse-a-null-pointer-exception-logs-in-logstash/233058/1 "2020-05-18T08:06:54Z")

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Hi Everyone,  
I am using One java application that throws null pointer exception and I want to parse the Java stack trace logs in logstash and I am got confused how to parse the logs generated by application.

Here are the logs generated,  
2020-05-18 12:05:32 WARN MyGUI:40 - Exceptions happen!  
java.lang.NullPointerException  
at com.gui.MyGUI.actionPerformed(MyGUI.java:38)  
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)  
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)  
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)  
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)  
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)  
at java.awt.Component.processMouseEvent(Component.java:6539)  
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)  
at java.awt.Component.processEvent(Component.java:6304)  
at java.awt.Container.processEvent(Container.java:2239)  
at java.awt.Component.dispatchEventImpl(Component.java:4889)  
at java.awt.Container.dispatchEventImpl(Container.java:2297)  
at java.awt.Component.dispatchEvent(Component.java:4711)  
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)  
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535)  
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476)  
at java.awt.Container.dispatchEventImpl(Container.java:2283)  
at java.awt.Window.dispatchEventImpl(Window.java:2746)  
at java.awt.Component.dispatchEvent(Component.java:4711)  
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)  
at java.awt.EventQueue.access$500(EventQueue.java:97)  
at java.awt.EventQueue$3.run(EventQueue.java:709)  
at java.awt.EventQueue$3.run(EventQueue.java:703)  
at java.security.AccessController.doPrivileged(Native Method)  
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)  
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)

Please help me as i just started to work on ELK Stack

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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:** [June 15, 2020, 8:06am UTC](https://discuss.elastic.co/t/parse-a-null-pointer-exception-logs-in-logstash/233058/2 "2020-06-15T08:06:54Z")

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