Cannot POST on Regex Tester (error 500)

[Alexwii]

Hello everyone.

I will start to excuse for my english...

I'm actually install a Graylog for production. And when I have tested, I haven't had this problem.

Problem description

When I want test my regular expression on "Extractor Configuration" graylog print this:

Could not try regular expression. Make sure that it is valid.
Details: Error: cannot POST http://xxx.xxx.xxx.xxx:12900/tools/regex_tester (500)

And logs file say:

2016-07-12T09:53:44.555+02:00 ERROR [AnyExceptionClassMapper] Unhandled exception in REST resource
java.util.regex.PatternSyntaxException: Dangling meta character '?' near index 0
?*
^
        at java.util.regex.Pattern.error(Pattern.java:1955) ~[?:1.8.0_20]
        at java.util.regex.Pattern.sequence(Pattern.java:2123) ~[?:1.8.0_20]
        at java.util.regex.Pattern.expr(Pattern.java:1996) ~[?:1.8.0_20]
        at java.util.regex.Pattern.compile(Pattern.java:1696) ~[?:1.8.0_20]
        at java.util.regex.Pattern.<init>(Pattern.java:1351) ~[?:1.8.0_20]
        at java.util.regex.Pattern.compile(Pattern.java:1054) ~[?:1.8.0_20]
        at org.graylog2.rest.resources.tools.RegexTesterResource.doTestRegex(RegexTesterResource.java:59) ~[graylog.jar:?]
        at org.graylog2.rest.resources.tools.RegexTesterResource.testRegex(RegexTesterResource.java:55) ~[graylog.jar:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_20]
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_20]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_20]
        at java.lang.reflect.Method.invoke(Method.java:483) ~[?:1.8.0_20]
        at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81) ~[graylog.jar:?]
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144) ~[graylog.jar:?]
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161) ~[graylog.jar:?]
        at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205) ~[graylog.jar:?]
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99) ~[graylog.jar:?]
        at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389) ~[graylog.jar:?]
        at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347) ~[graylog.jar:?]
        at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102) ~[graylog.jar:?]
        at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326) [graylog.jar:?]
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271) [graylog.jar:?]
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267) [graylog.jar:?]
        at org.glassfish.jersey.internal.Errors.process(Errors.java:315) [graylog.jar:?]
        at org.glassfish.jersey.internal.Errors.process(Errors.java:297) [graylog.jar:?]
        at org.glassfish.jersey.internal.Errors.process(Errors.java:267) [graylog.jar:?]
        at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317) [graylog.jar:?]
        at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305) [graylog.jar:?]
        at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154) [graylog.jar:?]
        at org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpContainer.service(GrizzlyHttpContainer.java:384) [graylog.jar:?]
        at org.glassfish.grizzly.http.server.HttpHandler$1.run(HttpHandler.java:224) [graylog.jar:?]
        at com.codahale.metrics.InstrumentedExecutorService$InstrumentedRunnable.run(InstrumentedExecutorService.java:176) [graylog.jar:?]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_20]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_20]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_20]

Steps to reproduce the problem

1. Add an extractor to an input
2. Choose "Grok Pattern" or "Regular expression"
3. In "Condition" choose "Only attempt extraction if field matches regular expression"
4. Write just one regular expression
5. Message appears and logs
   

Environment

• Graylog Version: 2.0.3
• Elasticsearch Version: 2.3.3
• MongoDB Version: 3.2.7
• Operating System: Redhat 6.6
• Browser version: Chrome 50