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@badvision
Created February 9, 2016 23:30
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Summarize all open JCR sessions by the stack trace of the code that opened them. This helps identify session leaks in code.
import groovy.json.JsonSlurper
//Get data from here: /system/sling/monitoring/mbeans/org/apache/jackrabbit/oak/%2522SessionStatistics%2522.2.json
def file = '/Users/brobert/Desktop/all_sessions.json' as File
def sanitizeStacktrace = {trace->
if (trace.contains("loginAdministrative")) {
def lines = trace.split("\n")
def startIdx;
for (def idx=0; idx < lines.length; idx++) {
if (lines[idx].contains("loginAdministrative")) {
if (lines[idx+1].contains("org.apache.sling.jcr.resource.internal.helper")) {
for (def idx2=idx+3; idx2 < lines.length; idx2++) {
if (!lines[idx2].contains("org.apache.sling.resourceresolver.impl")) {
return lines[idx2-1..Math.min(idx2+1,lines.length-1)].join("\n")
}
}
} else {
return lines[idx..Math.min(idx+2, lines.length-1)].join("\n")
}
break
}
}
}
return trace
}
def slurper = new JsonSlurper()
def data = slurper.parseText(file.text)
def counters = [:]
data.each{key,value->
if (value instanceof String || !value.containsKey('InitStackTrace')) return
def stacktrace = sanitizeStacktrace(value.InitStackTrace);
if (counters.get(stacktrace) == null) {
counters[stacktrace] = 1
} else {
counters[stacktrace]++
}
}
counters = counters.sort{-it.value}
def total = 0;
counters.each{stack,count->
println("${count} sessions")
println(stack)
total += count
println("------------------------------")
}
println("Total sessions: ${total}")
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