Exception in Grails 2.2.4

[fedotxxl]

23:22:12.617 [ERROR] [errors.GrailsExceptionResolver]: IllegalArgumentException occurred when processing request: [GET] /mviewer/serverStatus Cannot convert DBOject [[serverUsed:localhost/127.0.0.1:27017, host:gramant-fedor, version:2.2.0, process:mongod, pid:9488, uptime:1330.0, uptimeMillis:1329776, uptimeEstimate:1326.0, localTime:Sun Sep 29 23:22:12 MSK 2013, locks:[.:[timeLockedMicros:[R:15795, W:236543], timeAcquiringMicros:[R:101338, W:2317]], admin:[timeLockedMicros:[:], timeAcquiringMicros:[:]], local:[timeLockedMicros:[r:1003, w:0], timeAcquiringMicros:[r:59, w:0]], keynote:[timeLockedMicros:[r:13976, w:13396], timeAcquiringMicros:[r:156, w:35]]], globalLock:[totalTime:1329776000, lockTime:236543, currentQueue:[total:0, readers:0, writers:0], activeClients:[total:0, readers:0, writers:0]], mem:[bits:64, resident:55, virtual:305, supported:true, mapped:80, mappedWithJournal:160], connections:[current:9, available:19991], extra_info:[note:fields vary by platform, page_faults:18765, usagePageFileMB:70, totalPageFileMB:17838, availPageFileMB:3366, ramMB:8174], indexCounters:[note:not supported on this platform], backgroundFlushing:[flushes:22, total_ms:96, average_ms:4.363636363636363, last_ms:3, last_finished:Sun Sep 29 23:22:02 MSK 2013], cursors:[totalOpen:0, clientCursors_size:0, timedOut:0], network:[bytesIn:8905, bytesOut:16132, numRequests:87], opcounters:[insert:0, query:84, update:12, delete:0, getmore:0, command:36], asserts:[regular:0, warning:0, msg:0, user:0, rollovers:0], writeBacksQueued:false, dur:[commits:30, journaledMB:0.0, writeToDataFilesMB:0.0, compression:0.0, commitsInWriteLock:0, earlyCommits:0, timeMs:[dt:3065, prepLogBuffer:0, writeToJournal:0, writeToDataFiles:0, remapPrivateView:0]], recordStats:[accessesNotInMemory:1, pageFaultExceptionsThrown:1, keynote:[accessesNotInMemory:1, pageFaultExceptionsThrown:1], local:[accessesNotInMemory:0, pageFaultExceptionsThrown:0]], ok:1.0]] to target type class grails.converters.JSON. Type is not a persistent entity. Stacktrace follows: java.lang.IllegalArgumentException: Cannot convert DBOject [[serverUsed:localhost/127.0.0.1:27017, host:gramant-fedor, version:2.2.0, process:mongod, pid:9488, uptime:1330.0, uptimeMillis:1329776, uptimeEstimate:1326.0, localTime:Sun Sep 29 23:22:12 MSK 2013, locks:[.:[timeLockedMicros:[R:15795, W:236543], timeAcquiringMicros:[R:101338, W:2317]], admin:[timeLockedMicros:[:], timeAcquiringMicros:[:]], local:[timeLockedMicros:[r:1003, w:0], timeAcquiringMicros:[r:59, w:0]], keynote:[timeLockedMicros:[r:13976, w:13396], timeAcquiringMicros:[r:156, w:35]]], globalLock:[totalTime:1329776000, lockTime:236543, currentQueue:[total:0, readers:0, writers:0], activeClients:[total:0, readers:0, writers:0]], mem:[bits:64, resident:55, virtual:305, supported:true, mapped:80, mappedWithJournal:160], connections:[current:9, available:19991], extra_info:[note:fields vary by platform, page_faults:18765, usagePageFileMB:70, totalPageFileMB:17838, availPageFileMB:3366, ramMB:8174], indexCounters:[note:not supported on this platform], backgroundFlushing:[flushes:22, total_ms:96, average_ms:4.363636363636363, last_ms:3, last_finished:Sun Sep 29 23:22:02 MSK 2013], cursors:[totalOpen:0, clientCursors_size:0, timedOut:0], network:[bytesIn:8905, bytesOut:16132, numRequests:87], opcounters:[insert:0, query:84, update:12, delete:0, getmore:0, command:36], asserts:[regular:0, warning:0, msg:0, user:0, rollovers:0], writeBacksQueued:false, dur:[commits:30, journaledMB:0.0, writeToDataFilesMB:0.0, compression:0.0, commitsInWriteLock:0, earlyCommits:0, timeMs:[dt:3065, prepLogBuffer:0, writeToJournal:0, writeToDataFiles:0, remapPrivateView:0]], recordStats:[accessesNotInMemory:1, pageFaultExceptionsThrown:1, keynote:[accessesNotInMemory:1, pageFaultExceptionsThrown:1], local:[accessesNotInMemory:0, pageFaultExceptionsThrown:0]], ok:1.0]] to target type class grails.converters.JSON. Type is not a persistent entity at org.grails.datastore.gorm.mongo.plugin.support.MongoMethodsConfigurer$_configure_closure1.doCall(MongoMethodsConfigurer.groovy:69) at org.grails.plugin.mongodb.console.controllers.MviewerController.serverStatus(MviewerController.groovy:61) at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:195) at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63) at org.apache.shiro.grails.SavedRequestFilter.doFilter(SavedRequestFilter.java:55) at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449) at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365) at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90) at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83) at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:380) at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362) at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:722)

I think this http://jira.grails.org/browse/GPMONGODB-243 should help