FAQ.md

Chronos FAQ

Table of Contents

• [osx] making mesos fails on warning: 'JNI_CreateJavaVM' is deprecated
• My Web UI is not showing up!
• When running jobs locally I get an error like Failed to execute 'chown -R'
• I found a bug!

[osx] Making mesos fails on deprecated header warning

Error message such as:

conftest.cpp:7: warning: 'JNI_CreateJavaVM' is deprecated (declared at /System/Library/Frameworks/JavaVM.framework/Headers/jni.h:1937)

This error is the result of OSX shipping with an outdated version of the JDK and associated libraries. To resolve this issue, do the following.

1. Download and install JDK7.
2. Set JDK7 as active:
   export JAVA_HOME=$(/usr/libexec/java_home -v 1.7)
   Note: Stick this in your ~/.*rc to always use 1.7
3. Find your JNI headers, these should be in $JAVA_HOME/include and $JAVA_HOME/include/darwin.
4. Configure mesos with JAVA_CPPFLAGS set to the JNI path.

Example Assumptions:

• $JAVA_HOME in this example is /Library/Java/JavaVirtualMachines/jdk1.7.0_12.jdk/Contents/Home
• The current working directory is mesos/build as advised by the mesos README

Example:

JAVA_CPPFLAGS='-I/Library/Java/JavaVirtualMachines/jdk1.7.0_12.jdk/Contents/Home/include/ -I/Library/Java/JavaVirtualMachines/jdk1.7.0_12.jdk/Contents/Home/include/darwin/' ../configure

My Web UI is not showing up!

See docs/WEBUI.md.

When running jobs locally I get an error like Failed to execute 'chown -R'

If you get an error such as:

	Failed to execute 'chown -R 0:0 '/tmp/mesos/slaves/executors/...' ... Undefined error: 0
	Failed to launch executor`

You can try starting your mesos slaves with switch users disabled. To do this, start your slaves in the following manner:

	MESOS_SWITCH_USER=0 bin/mesos-slave.sh --master=zk://localhost:2181/mesos --resources="cpus:8,mem:68551;disk:803394"

I found a bug!

That's too bad, please start by consulting our guidelines on Reporting Bugs.