APM Workstation Connection Failures and Agent Disconnections.

Products

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

Issue/Introduction

 We are unable to connect to Workstation, the Agents are disconnecting and in the MOM log the below error is reported:

[ERROR] [Acceptor Helper 2] [Manager.Transport] Incoming connection failed because of exception
java.lang.RuntimeException: Transporting data too big consumed 4001 buffers exceeded max allowed: 4000
at com.wily.isengard.postofficehub.link.v1.server.BufferPool.take(BufferPool.java:100)
at com.wily.isengard.postofficehub.link.v1.server.ByteBufferInputStream.readFromChannel2(ByteBufferInputStream.java:224)
at com.wily.isengard.postofficehub.link.v1.server.ByteBufferInputStream.readFromChannel(ByteBufferInputStream.java:188)
at com.wily.isengard.postofficehub.link.v1.server.ByteBufferInputStream.read(ByteBufferInputStream.java:138)
at java.io.DataInputStream.readUnsignedShort(DataInputStream.java:337) 

at java.io.DataInputStream.readUTF(DataInputStream.java:589) 

Environment

DX APM 10.x

Resolution

Apply the below change in all the EMs (MOM and Collectors)

1. Open the <EM-HOME>/config/IntroscopeEnterpriseManager.properties

2. Add the following property(ies):

transport.buffer.input.maxNum=8000

or

transport.buffer.input.maxNumNio=8000 if using NIO (default on Linux)

3. Restart of the Introscope Enterprise Manager process for this new setting to take effect.

Additional Information

APM 10.x - Troubleshooting and Best Practices