2397798 - error "Server Response Code:400" after Manager installation or Apache Tomcat version change

Symptom

You recieve error "Server Response Code:400" after Manager installation or Apache version change:

You may see the following error in your catalina.<datestamp>.log or in tomcat*-stderr.<datestamp>.log:

INFO [http-nio-8080-exec-9] org.apache.coyote.http11.AbstractHttp11Processor.process Error parsing HTTP request header
Note: further occurrences of HTTP header parsing errors will be logged at DEBUG level.

You may see the following error in your localhost_access_log.<datestamp>.txt:

"GET null null" 400 -

Environment

The problem can be seen in SAP Enable Now Manager version 10, 10 SP1 or SAP Workforce Performance Builder Manager version 9.4.x or 9.5.x with Apache versions:

7.0.x where the version is greater than 7.0.72
8.0.x where the version is greater than 8.0.37
8.5.x where the version is greater than 8.5.11
9.0.x or greater

Product

SAP Enable Now, consumption option 1.0 ; SAP Workforce Performance Builder 9.4, enterprise edition ; SAP Workforce Performance Builder 9.4, manager option ; SAP Workforce Performance Builder 9.5, consumption option ; SAP Workforce Performance Builder 9.5, enterprise edition ; SAP Workforce Performance Builder 9.5, manager option

Keywords

Workforce Performance Builder, Manager, Apache Tomcat, 400, error, response code, install, upgrade, SAP Enable Now , KBA , KM-SEN , SAP Enable Now , KM-SEN-MGR , SAP Enable Now - Manager , Bug Filed

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