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Support Article

Error while attaching files



In a two-node environment, one node is no longer able to upload any files after a maintenance restart. When file uploads are attempted, an exception is thrown.

Error Messages

In Pega logs:

016-03-14 04:46:43,789 [ANDARD, eon_id=56704] [          ] [                    ] [                    ] (      web.impl.WebStandardImpl) ERROR   - <ip>: Unhandled error in ETier invocation
java.lang.IllegalArgumentException: Header message of length [32,764] received but the packetSize is only [8,192]
    at org.apache.coyote.ajp.AjpProcessor.readMessage(
    at org.apache.coyote.ajp.AjpProcessor.receive(
    at org.apache.coyote.ajp.AbstractAjpProcessor$SocketInputBuffer.doRead(
    at org.apache.coyote.Request.doRead(
    at org.apache.catalina.connector.InputBuffer.realReadBytes(
    at org.apache.tomcat.util.buf.ByteChunk.substract(


Steps to Reproduce

Attach a file.

Root Cause

A defect or configuration issue in the operating environment:

Apache web server packetSize is not the same as that of the Tomcat.


Make the following change to the operating environment: 

Make sure the packet size setting in Apache and Tomcat are the same.


Published March 18, 2016 - Updated October 8, 2020

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