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async-profiler says it avoids safepoint problem in its README and a low-level profile for jvm-applications.

I'm curious if riemann-jvm-profiler also avoid safepoint, and what's more or less compared with async-profile, Thanks in advance.

I'm using the riemann-jvm-profiler as javaagent.

I've added this in my server startup script
RIEMANN_OPTS="-javaagent:'/var/opt/lib/riemann-jvm-profiler-0.1.0-standalone.jar=host=riemannhost,port=5556,localhost-pid?=true,dt=10,load=0.03'"

JAVA_OPTS="${MONITORING_OPTS} ${RIEMANN_OPTS} "

After starting up the server. I see these in the log file
JAVA_OPTS: -server -XX:+UseCompressedOops - -XX:MaxPermSize=512m -Xms8192m -Xmx8192m -XX:+PrintGCDateStamps -XX:+PrintGCDetails -javaagent:'/var/opt/lib/riemann-jvm-profiler-0.1.0-standalone.jar=host=riemannhost,port=5556,localhost-pid?=true,dt=10,load=0.03'

However after running my test cases i don't see any profiling information sent to my riemannhost. riemann.log also looks empty. What is the best way to debug this.

I'm using jboss as my application server

I built the profiling jar using lein as mentioned in https://github.com/riemann/riemann-jvm-profiler

Here is the command to run this as a java agent
-javaagent:'/var/opt/lib/riemann-jvm-profiler-0.1.0.jar=prefix=MyApp,host=MyRiemannServer'

At the runtime i see this error

Exception in thread "main" java.lang.ClassNotFoundException: riemann.jvm_profiler.Agent
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

My Lein Version
lein --version
Leiningen 1.7.1 on Java 1.8.0_66 Java HotSpot(TM) 64-Bit Server VM

When i unzip the riemann-jvm-profiler-0.1.0.jar,I just see stack.clj under /riemann/jvm_profiler
I see Agent.Java under /riemann
Is there any problem with the build.

when i tried to start riemann got the following error in main class . confirmed that the jar
riemann-jvm-profiler-0.1.0-standalone.jar
riemann-jvm-profiler-0.1.0.jar

are in classpath

Exception in thread "main" java.lang.NoClassDefFoundError: clojure/lang/ITransientMap
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2484)
at java.lang.Class.getMethod0(Class.java:2727)
at java.lang.Class.getMethod(Class.java:1639)
at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:294)
at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:338)
Caused by: java.lang.ClassNotFoundException: clojure.lang.ITransientMap
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 6 more
FATAL ERROR in native method: processing of -javaagent failed
Abort trap: 6

I'm trying to add riemann-jvm-profiler to hive mapred jobs

hive> set mapreduce.map.java.opts=-javaagent:'/var/lib/riemann-jvm-profiler.jar=prefix=profiler,host=10.50.xx.xx'
hive> set mapreduce.reduce.java.opts=-javaagent:'/var/lib/riemann-jvm-profiler.jar=prefix=profiler,host=10.50.xx.xx'
hive> select count(*) from test_table;
Total MapReduce jobs = 1
Launching Job 1 out of 1
Number of reduce tasks determined at compile time: 1
In order to change the average load for a reducer (in bytes):
  set hive.exec.reducers.bytes.per.reducer=<number>
In order to limit the maximum number of reducers:
  set hive.exec.reducers.max=<number>
In order to set a constant number of reducers:
  set mapred.reduce.tasks=<number>
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

This riemann-jvm-profiler.jar works well with tomcat on other server.
Hive version 0.12.0-cdh5.1.3

Exception in thread "main" java.lang.ClassNotFoundException: riemann.jvm_profiler.Agent
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:280)
    at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:338)
FATAL ERROR in native method: processing of -javaagent failed
Aborted (core dumped)

I encounter this error when following the 'As a Java agent' section of the README, profiling a trivial hello-world main function.

Exact command:
java -javaagent:'/home/rmaus/scratch/riemann/riemann-jvm-profiler/riemann-jvm-profiler-0.1.0-standalone.jar=prefix=TEST,host=localhost,localhost-pid?=true' -cp test.jar com.Test

Software versions:
java version "1.6.0_30"
Java(TM) SE Runtime Environment (build 1.6.0_30-b12)
Java HotSpot(TM) 64-Bit Server VM (build 20.5-b03, mixed mode)

Leiningen 1.7.1 on Java 1.6.0_30 Java HotSpot(TM) 64-Bit Server VM