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    You try to parse a String that contains non-numeric characters to an int. The string must contain decimal characters only, optionally beginning with a + or - sign.

Solutions on the web

via Jenkins JIRA by vojtechhabarta, 1 year ago
via Jenkins JIRA by vojtechhabarta, 2 years ago
via Stack Overflow by Unknown author, 2 years ago
via Coderanch by Craig Angus, 1 year ago
via Google Groups by Chip Burke, 1 year ago
java.lang.NumberFormatException: null at java.lang.Integer.parseInt(Integer.java:415) at java.lang.Integer.parseInt(Integer.java:497) at hudson.model.Job$2.compare(Job.java:329) at hudson.model.Job$2.compare(Job.java:327) at hudson.widgets.HistoryWidget.doAjax(HistoryWidget.java:118) at sun.reflect.GeneratedMethodAccessor267.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:103) at org.kohsuke.stapler.Function.bindAndinvoke(Function.java:57) at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:75) at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:30) at org.kohsuke.stapler.Stapler.invoke(Stapler.java:432) at org.kohsuke.stapler.MetaClass$15.dispatch(MetaClass.java:375) at org.kohsuke.stapler.Stapler.invoke(Stapler.java:432) at org.kohsuke.stapler.MetaClass$9.doDispatch(MetaClass.java:254) at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:30) at org.kohsuke.stapler.Stapler.invoke(Stapler.java:432) at org.kohsuke.stapler.Stapler.invoke(Stapler.java:360) at org.kohsuke.stapler.Stapler.service(Stapler.java:120) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:88)