Error in IntroscopeWebView.log evey 15 seconds

Products

• CA Application Performance Management Agent (APM / Wily / Introscope)
• INTROSCOPE

Issue/Introduction

 

The following error show up in IntroscoepWebview.log every 15 secs

 

[ERROR] [WebView] Identifier: 6337.1512066715 - receiveMessage() failed for : com.ca.apm.introscope.workstation.webapp.server.models.DashboardModel::3002
java.lang.NullPointerException
at com.ca.apm.introscope.workstation.webapp.server.utilities.mm.TrackingManager.getUpdates(TrackingManager.java:78)
at com.ca.apm.introscope.workstation.webapp.server.models.DashboardModel.receiveMessage(DashboardModel.java:51)
at com.ca.apm.introscope.workstation.webapp.server.models.ModelManager$ModelRequestThread$1.run(ModelManager.java:410)
at java.lang.Thread.run(Thread.java:745)
11/30/17 01:31:55.818 PM EST [ERROR] [WebView] Identifier: 6338.1512066715 - receiveMessage() failed for : com.ca.apm.introscope.workstation.webapp.server.models.ManagementModulesTreeModel::2106
java.lang.NullPointerException
at com.ca.apm.introscope.workstation.webapp.server.utilities.mm.TrackingManager.getUpdates(TrackingManager.java:78)
at com.ca.apm.introscope.workstation.webapp.server.models.ManagementModulesTreeModel.receiveMessage(ManagementModulesTreeModel.java:171)
at com.ca.apm.introscope.workstation.webapp.server.models.ModelManager$ModelRequestThread$1.run(ModelManager.java:410)
at java.lang.Thread.run(Thread.java:745)

Environment

APM 10.x

Cause

 Related to Webview cache. Basically its retrieving info about the ManagementModule, but running into an object that has no memory

 

Resolution

 Try clearing the WebView cache : 

1. Stop the Webview and MOM EM.

2 - Go to the \product\webview\configuration directory

      Delete all directories only : ( do NOT delete the config.ini )

3 - Go to the \product\enterprisemanager\configuration directory

      Delete all directories only : ( do NOT delete the config.ini )

4 - Go to the \work directory and delete its contents.

5 - Clear the appropriate browser cache.

6 - Start the MOM and Webview .

Additional Information

 

When to clear Webview cache and how to do this