NullPointerException's Error in Webview log

Products

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

Issue/Introduction

Following error in the webview log repeated regularly after upgrading to 10.7.0.45 HF58: 

4/06/20 01:50:48.130 PM AEST [ERROR] [WebServer.AAsyncMessagePipeEndpoint] Caught exception while handling stream message. java.lang.NullPointerException

Environment

APM 10.7.0 HF58

Resolution

We can see frequent agent disconnections. This has lead to the frequent NullPointerException's. They get thrown routinely on disconnections or when a workstation hangs up ungracefully.

These messages doesn't cause any harm and we can ignore these.