bigdata-dev team mailing list archive

[Kevin W Monroe <kevin.monroe@xxxxxxxxxxxxx>]

Hi Sam, this was fixed with a commit late last month:

http://bazaar.launchpad.net/~bigdata-charmers/charms/trusty/hdp-
hadoop/trunk/revision/30?remember=32

This is the infamous jps problem that plagued big data charms since the
openjdk 7u75 update.  In your case, namenode-relation-joined *should*
have detected that namenode was running and returned before the call to
start_namenode():

http://bazaar.launchpad.net/~bigdata-charmers/charms/trusty/hdp-
hadoop/trunk/view/head:/hooks/hdp-hadoop-common.py#L438

However, prior to the above commit, jps running as root did not detect a
running NameNode process, so it fell through to start_namenode() and
caused this bug.  We no longer rely on jps, but rather pgrep to detect
running processes, so this should be working correctly now.  The latest
hdp-hadoop (currently REVNO32) contains this fix.

** Changed in: hdp-hadoop (Juju Charms Collection)
       Status: New => Fix Released

** Changed in: hdp-pig (Juju Charms Collection)
       Status: New => Fix Released

-- 
You received this bug notification because you are a member of Juju Big
Data Development, which is a bug assignee.
https://bugs.launchpad.net/bugs/1414080

Title:
  Race condition on relation when bundling hdp-hadoop

Status in hdp-hadoop package in Juju Charms Collection:
  Fix Released
Status in hdp-pig package in Juju Charms Collection:
  Fix Released

Bug description:
  I build a demo to run a Machine Learning workshop based on a blog post
  made by Hortonworks.

  There are 2 sides in the demo: 
  * Bundle: https://github.com/SaMnCo/bundle-flight-delay-demo
  * Charm: https://github.com/SaMnCo/charm-flight-delay-demo

  The bundle comprises:

  * YARN Master
  * 4x compute nodes
  * PIG colocated on YARN
  * ipython-notebook colocated on YARN

  When I deploy manually using the 00-deploy file provided in the
  bundle, everything goes well. However, when trying to deploy the
  bundle, it fails at relation creation.

  In the attached juju log collected at deployment, line 11347, we see
  Hadoop crashing. Then 11402, the crash expands. 11418, we discover the
  resource manager is not ready.

  I can reproduce the same behavior with a simpler bundle comprising:

  * YARN Master
  * 4x compute nodes
  * PIG colocated on YARN

  So it seems to really be related to PIG/YARN/Compute nodes relation.

  I can also reproduce the same behavior from juju-deployer, which fails
  with :

  2015-01-23 16:51:21 [INFO] deployer.import: Adding relations...
  2015-01-23 16:51:23 [INFO] deployer.import:  Adding relation c00-yarn-master:namenode <-> c02-compute-node:datanode
  2015-01-23 16:51:24 [INFO] deployer.import:  Adding relation c00-yarn-master:resourcemanager <-> c02-compute-node:nodemanager
  2015-01-23 16:51:25 [INFO] deployer.import:  Adding relation c04-hdp-pig:namenode <-> c00-yarn-master:namenode
  2015-01-23 16:51:25 [INFO] deployer.import:  Adding relation c04-hdp-pig:resourcemanager <-> c00-yarn-master:resourcemanager
  2015-01-23 16:51:26 [INFO] deployer.import:  Adding relation c03-flight-delay-demo:notebook <-> c01-ipython-notebook:notebook
  2015-01-23 16:51:26 [DEBUG] deployer.import: Waiting for relation convergence 60s
  2015-01-23 16:52:29 [ERROR] deployer.env: The following units had errors:
     unit: c00-yarn-master/0: machine: 1 agent-state: error details: hook failed: "namenode-relation-joined"
  2015-01-23 16:52:29 [INFO] deployer.cli: Deployment stopped. run time: 583.23

  Let me know if you need anything else! 
  Thanks!

To manage notifications about this bug go to:
https://bugs.launchpad.net/charms/+source/hdp-hadoop/+bug/1414080/+subscriptions