Troubleshoot Myriad

Log Locations

Table 1. Log Files
File	Location
Frame/executor task logs. Used for debugging on Mesos slave nodes.	Default: /tmp/mesos/slaves/<slave-ID>/frameworks/ Custom: /etc/mesos-slave/<work-directory>
Mesos master/slave service logs. INFO, WARN, AND ERR logs	/var/log/mesos/*
Init log from starting the Mesos services.	/opt/mapr/mesos-services/mesos-services-0.1/logs/*-init.log

Resource Manager not Starting

The Resource Manager cannot be started from the command line using the following command:

$ yarn resourcemanager

The following error occurs:

java.lang.UnsatisfiedLinkError: no mesos in java.library.path

Workaround:

Manually pass the MESOS_NATIVE_LIBRARY environment variable when starting the Resource Manager. For example:

env && export MESOS_NATIVE_LIBRARY=/usr/local/lib/libmesos.so && yarn
          resourcemanager

NOTE: This is not an issue when starting Resource Manager from the Marathon UI.

Marathon Fails

The Mesos-3602 fix in Mesos version 0.26 causes an issue when using the maprfs path for the URI. When starting Marathon, an extra forward slash (/) is appended to the URI path. The application fails with a message similar to the following:


hadoop fs -copyToLocal '/maprfs:///dist/hadoop-2.7.0.myriad1.tar.gz'
'/opt/mapr/slaves/67d1f64c-449b-4609-82f3-5da309f3c5c5-S9/frameworks/67d1f64c-449b-4609-82f3-5da309f3c5c5-0000/executors/myriad1.63bbb98c-c072-11e5-b686-0cc47a587d20/runs/427fe309-82c5-4f8b-9fa3-6dd39a4a5ef4/hadoop-2.7.0.myriad1.tar.gz
-copyToLocal: java.net.URISyntaxException: Expected scheme-specific part at
index 7: maprfs:

Workaround:

Replace maprfs:/// with hdfs:/// when specifying the URI on Marathon application.

NOTE: This issue is fixed by MESOS-4304, which is available with in the Mesos 0.27 release.