HTTP Status 500 – Internal Server Error


Type Exception Report

Message java.lang.IllegalArgumentException: Comparison method violates its general contract!

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

org.apache.jasper.JasperException: java.lang.IllegalArgumentException: Comparison method violates its general contract!
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:501)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:380)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:328)
	jakarta.servlet.http.HttpServlet.service(HttpServlet.java:792)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

Root Cause

java.lang.IllegalArgumentException: Comparison method violates its general contract!
	java.base/java.util.TimSort.mergeHi(Unknown Source)
	java.base/java.util.TimSort.mergeAt(Unknown Source)
	java.base/java.util.TimSort.mergeForceCollapse(Unknown Source)
	java.base/java.util.TimSort.sort(Unknown Source)
	java.base/java.util.Arrays.sort(Unknown Source)
	java.base/java.util.ArrayList.sort(Unknown Source)
	java.base/java.util.Collections.sort(Unknown Source)
	massbank.ResultList.sortList(ResultList.java:131)
	massbank.web.QueryToResultList.toResultList(QueryToResultList.java:113)
	org.apache.jsp.Result_jsp._jspService(Result_jsp.java:1098)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	jakarta.servlet.http.HttpServlet.service(HttpServlet.java:792)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:466)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:380)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:328)
	jakarta.servlet.http.HttpServlet.service(HttpServlet.java:792)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

Note The full stack trace of the root cause is available in the server logs.


Apache Tomcat