(Optional) Configure the HTTP Header Size

The maxHttpHeaderSize parameter defines the maximum size of the request and response HTTP header, specified in bytes. If it is not specified, this parameter defaults to 8192 (8KB).

When Kerberos security is enabled, you may need to increase this value in the server.xml file:

/opt/mapr/httpfs/httpfs-1.0/share/hadoop/httpfs/tomcat/conf/server.xml
For example:
<Connector port="${httpfs.http.port}" maxHttpHeaderSize="32000" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443"/>
If you do not increase this value, you may encounter errors of the following form:
HTTP/1.1 400 Bad Request
Note: After making this configuration change, restart the httpFS server.