Summary

'Uncaught error' when starting DataStax Studio on Linux

Applies to

• DataStax Studio on Linux (seen on DataStax Studio 6.0.2)

Symptoms

When starting DataStax Studio with ./server.sh, the following error occurs

[user@hostname:~/datastax-studio-6.0.2/bin]$./server.sh

Starting Studio. This may take a few minutes. You will be notified here when Studio is ready.
Uncaught error from thread [Studio-eventuate.log.dispatchers.write-dispatcher-7] shutting down JVM since 'akka.jvm-exit-on-fatal-error' is enabled for ActorSystem[Studio] 
java.lang.UnsatisfiedLinkError: Could not load library. Reasons: [no leveldbjni64-1.8 in java.library.path, no leveldbjni-1.8 in java.library.path, no leveldbjni in java.library.path, /tmp/libleveldbjni-64-1-9150286051047390226.8: /tmp/libleveldbjni-64-1-9150286051047390226.8: failed to map segment from shared object: Operation not permitted]
 at org.fusesource.hawtjni.runtime.Library.doLoad(Library.java:182)
 at org.fusesource.hawtjni.runtime.Library.load(Library.java:140)
 at org.fusesource.leveldbjni.JniDBFactory.<clinit>(JniDBFactory.java:48)
 at com.rbmhtechnology.eventuate.log.leveldb.LeveldbEventLog.<init>(LeveldbEventLog.scala:97)
 at com.rbmhtechnology.eventuate.log.leveldb.LeveldbEventLog$$anonfun$7.apply(LeveldbEventLog.scala:362)
 at com.rbmhtechnology.eventuate.log.leveldb.LeveldbEventLog$$anonfun$7.apply(LeveldbEventLog.scala:362)
<truncated for readability>

Cause

This issue is due to the user running the java process not having the necessary rights and therefore being unable to generate temporary files under /tmp

Solution

Solution 1- Allow the user running DataStax studio read/write/execute access on /tmp
- Remove the noexec parameter when mounting /tmp
- Change the execution rights on /tmp. ie: sudo chmod 777 /tmp

Solution 2- Change the temp directory used by DataStax Studio
- As per the cause, create/use a folder on which the user has execution rights. In the example below, we insert the STUDIO_JVM_ARGS with temp directory pointing to /home/user/tmp in /home/user/datastax-studio-6.0.2/bin/setenv.sh:

echo STUDIO_JVM_ARGS='-Djava.io.tmpdir=/home/user/tmp' | tee -a /home/user/datastax-studio-6.0.2/bin/setenv.sh 

• Restart DataStax Studio