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Symptoms of the issue include:
java.lang.IllegalStateException: JBWEB002005: Header count exceeded allowed maximum [128]
The JBoss container limits the Mime Header count to 128 by default. This header count is related to how resources in the /designer interface are accessed.
To resolve the issue, perform the following:
<system-properties><property name="org.apache.tomcat.util.http.Parameters.MAX_COUNT" value="5000"/></system-properties>
<system-properties>
<property name="org.apache.tomcat.util.http.MimeHeaders.MAX_COUNT" value="512"/>.
This article applies to all versions of Appian.
Last Reviewed: April 2018