I had a host that wasn’t backing up at all and found the following error message within the CrashPlan engine_error.log located in /usr/local/crashplan/log
Exception in thread "W87903837_ScanWrkr" java.lang.NoClassDefFoundError: Could not initialize class com.code42.jna.inotify.InotifyManager at com.code42.jna.inotify.JNAInotifyFileWatcherDriver.<init>(JNAInotifyFileWatcherDriver.java:21) at com.code42.backup.path.BackupSetsManager.initFileWatcherDriver(BackupSetsManager.java:393) at com.code42.backup.path.BackupSetsManager.startScheduledFileQueue(BackupSetsManager.java:331) at com.code42.backup.path.BackupSetsManager.access$1600(BackupSetsManager.java:66) at com.code42.backup.path.BackupSetsManager$ScanWorker.delay(BackupSetsManager.java:1073) at com.code42.utils.AWorker.run(AWorker.java:158) at java.lang.Thread.run(Thread.java:744)
From what I could tell it was related to a CentOS 6.x upgrade that may have set the noexec on /tmp which wasn’t set previously.
The error sees to be related to writing files to the /tmp directory, the following two websites I found by a simple Google search revealed this problem.
http://feeding.cloud.geek.nz/posts/crashplan-and-non-executable-tmp-directories/
https://randomwindowstips.wordpress.com/2013/02/25/crashplan-pro-for-linux-stuck-at-waiting-for-backup-or-connecting-to-backup-destination/
You have to update the CrashPlan Java options to store its temporary that isn’t mounted as “noexec” by your system
Open up /usr/local/crashplan/bin/run.conf and add the following to the end of SRV_JAVA_OPTS
-Djava.io.tmpdir=/var/crashplan
