ERROR: "HTTP Status 400 - Request header is too large" OM Web Viewer 12.1

Products

• Output Management Web Viewer

Issue/Introduction

Receiving HTTP Status 400 - Bad Request intermittently when attempting to retrieve reports. It is working fine for some users and it does not happen consistently.

Logs show

 java.lang.IllegalArgumentException: Invalid character found in the request target. The valid characters are defined in RFC 7230 and RFC 3986
...
 java.lang.IllegalArgumentException: Request header is too large

Environment

Output Management Web Viewer 12.1

Resolution

In the server.xml file, for the connector port in use,  modify the maxHttpHeaderSize as shown.

<Connector port="8080" maxHttpHeaderSize="65536" protocol="HTTP/1.1" ... />