# Metricbeat 5.4.0 Jolokia module **URL:** \ **Category:** Beats\ **Tags:** metricbeat\ **Created:** [May 18, 2017, 6:34pm UTC](https://discuss.elastic.co/t/metricbeat-5-4-0-jolokia-module/86319 "2017-05-18T18:34:21Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![joshuaclark](https://avatars.discourse-cdn.com/v4/letter/j/5daacb/32.png) [@joshuaclark](https://discuss.elastic.co/u/joshuaclark)\ **Post date:** [May 18, 2017, 6:34pm UTC](https://discuss.elastic.co/t/metricbeat-5-4-0-jolokia-module/86319/1 "2017-05-18T18:34:21Z")
Hi, I'm trying to use the Jolokia module. When I try to start metricbeats it gives me an error "missing required field accessing 'metricbeat.modules.1.jmx.mappings'" when I try to start metricbeats. This is my config for the module ```auto hosts: ["localhost:8474"] namespace: "metrics" path: "/jolokia/?ignoreErrors=true&canonicalNaming=false" jmx.mapping: - mbean: 'java.lang:type=Runtime' attributes: - attr: Uptime field: uptime field_type: integer - mbean: 'java.lang:type=GarbageCollector,name=PS MarkSweep' attributes: - attr: CollectionTime field: gc.cms_collection_time - attr: CollectionCount field: gc.cms_collection_count field_type: integer - mbean: 'java.lang:type=Memory' attributes: - attr: HeapMemoryUsagePercent field: memory.heap_usage_pct field_type: integer - attr: NonHeapMemoryUsage field: memory.non_heap_usage field_type: integer - mbean: 'java.lang:type=OperatingSystem' attributes: - attr: ProcessCpuLoad field: cpu.processload.pct field_type: integer - mbean: 'java.lang:type=ClassLoading' attributes: - attr: LoadedClassCount field: classloaded.classcount field_type: integer - attr: TotalLoadedClassCCount field: classloading.totalclasscount field_type: integer - mbean: 'java.lang:type=Threading' attributes: - attr: DaemonThreadCount field: threadcount.daemon field_type: integer - attr: DeadlockedThreadCount field: threadcount.deadlocked field_type: integer - attr: PeakThreadCount field: threadcount.peak field_type: integer - attr: ThreadCount field: threadcount.threadcount field_type: integer jmx.application: application1 jmx.instance: instance1 ``` Can you please tell me what might be wrong? Thank you for your time. ---
**Author:** ![ruflin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ruflin/32/3116_2.png) [@ruflin](https://discuss.elastic.co/u/ruflin)\ **Post date:** [May 19, 2017, 2:36pm UTC](https://discuss.elastic.co/t/metricbeat-5-4-0-jolokia-module/86319/2 "2017-05-19T14:36:28Z")
You use `jmx.mapping` bug it reuquires `jmx.mappings` (see s at the end) ---
**Author:** ![joshuaclark](https://avatars.discourse-cdn.com/v4/letter/j/5daacb/32.png) [@joshuaclark](https://discuss.elastic.co/u/joshuaclark)\ **Post date:** [May 19, 2017, 7:46pm UTC](https://discuss.elastic.co/t/metricbeat-5-4-0-jolokia-module/86319/3 "2017-05-19T19:46:29Z")
Thanks. That worked. But now I get this error "error": "Cannot unmarshal json response: invalid character '\x00' looking for beginning of value", "jolokia": { "jmx": {} }, "metricset": { "host": "localhost:8474", "module": "jolokia", "name": "jmx", "rtt": 1109 }, "type": "metricsets" } ---
**Author:** ![ruflin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ruflin/32/3116_2.png) [@ruflin](https://discuss.elastic.co/u/ruflin)\ **Post date:** [May 22, 2017, 11:35am UTC](https://discuss.elastic.co/t/metricbeat-5-4-0-jolokia-module/86319/4 "2017-05-22T11:35:04Z")
Interesting. Any chance you could fetch the output manually and potentially paste it here on in a gist. Would be nice to do some testing on it and see if we have an unexpected output here. ---
**Author:** ![joshuaclark](https://avatars.discourse-cdn.com/v4/letter/j/5daacb/32.png) [@joshuaclark](https://discuss.elastic.co/u/joshuaclark)\ **Post date:** [May 22, 2017, 5:18pm UTC](https://discuss.elastic.co/t/metricbeat-5-4-0-jolokia-module/86319/5 "2017-05-22T17:18:21Z")
Do we need to have Jolokia agent/client installed on the server? We have the JEE Agent (WAR) installed on the server which is described on here [https://jolokia.org/reference/html/agents.html](https://jolokia.org/reference/html/agents.html). There's no errors in the logs but none of the fields are coming through to the index pattern even after refreshing the field list. I was wondering if you have any suggestions? ---
**Author:** ![ruflin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ruflin/32/3116_2.png) [@ruflin](https://discuss.elastic.co/u/ruflin)\ **Post date:** [May 23, 2017, 1:08pm UTC](https://discuss.elastic.co/t/metricbeat-5-4-0-jolokia-module/86319/6 "2017-05-23T13:08:38Z")
Based on the jolokia docs I would assume your setup should be fine. Can you manually access the endpoint? ---
**Author:** ![joshuaclark](https://avatars.discourse-cdn.com/v4/letter/j/5daacb/32.png) [@joshuaclark](https://discuss.elastic.co/u/joshuaclark)\ **Post date:** [May 23, 2017, 2:36pm UTC](https://discuss.elastic.co/t/metricbeat-5-4-0-jolokia-module/86319/7 "2017-05-23T14:36:18Z")
## Using the jmx4perl we get the following ; Name: Apache Tomcat Vendor: Apache Version: 7.0.78 Memory: Heap-Memory used : 86 MB Heap-Memory alloc : 631 MB Heap-Memory max : 1751 MB NonHeap-Memory max : 130 MB Classes: Classes loaded : 2868 Classes total : 2869 Threads: Threads current : 31 Threads peak : 32 OS: CPU Arch : amd64 CPU OS : Linux 2.6.32-431.el6.x86\_64 Memory total : 1775 MB Memory free : 1775 MB Swap total : 2047 MB Swap free : 2027 MB FileDesc Open : 53 FileDesc Max : 4096 Runtime: Name : 13789@server JVM : 24.79-b02 Java HotSpot(TM) 64-Bit Server VM Oracle Corporation Uptime : 31 m, 46 s Starttime : Wed May 24 10:25:41 2017 but metricbeat is giving us; May 24th 2017, 10:35:44.702 metricset.module:jolokia @timestamp:May 24th 2017, 10:35:44.702 beat.hostname:servername [beat.name](http://beat.name):servername beat.version:5.4.0 error:Cannot unmarshal json response: invalid character '\x00' looking for beginning of value metricset.host:ip: [8474metricset.name](http://8474metricset.name):jmx metricset.rtt:995 type:metricsets \_id:AVw7GXtjZtE6CXXOqSF2 \_type:metricsets \_index:metricbeat-2017.05.24 \_score: - ---
**Author:** ![ruflin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ruflin/32/3116_2.png) [@ruflin](https://discuss.elastic.co/u/ruflin)\ **Post date:** [May 26, 2017, 6:12am UTC](https://discuss.elastic.co/t/metricbeat-5-4-0-jolokia-module/86319/8 "2017-05-26T06:12:30Z")
Could you try it with only 1 Mbean, for example the Runtime one and see if that works? You defined the path which is identical to the default path. Should not have any affect, but perhaps leave it out? Could you check what you get if you fetch the following url in your browser or over curl: `http://localhost:8778/jolokia/?ignoreErrors=true&canonicalNaming=false` Can you paste the output here? Please change the port to 8474 as you seem to have a different port. ---
**Author:** ![joshuaclark](https://avatars.discourse-cdn.com/v4/letter/j/5daacb/32.png) [@joshuaclark](https://discuss.elastic.co/u/joshuaclark)\ **Post date:** [May 31, 2017, 5:45pm UTC](https://discuss.elastic.co/t/metricbeat-5-4-0-jolokia-module/86319/9 "2017-05-31T17:45:32Z")
I apologize for my late reply. I figured out where the issue was. We needed to use the JVM Agent listed under 3.4. JVM Agent on this tutorial for Jolokia [https://jolokia.org/reference/html/agents.html#agents-jvm](https://jolokia.org/reference/html/agents.html#agents-jvm) . Then set what port we wanted to use to get the metrics with Metricbeat. Thank you for your help with this. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [June 28, 2017, 5:45pm UTC](https://discuss.elastic.co/t/metricbeat-5-4-0-jolokia-module/86319/10 "2017-06-28T17:45:40Z")
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