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2015-06-08 23:15:18 -0600 asked a question ERROR sahara.service.ops [-] Error during operating cluster 'test-cluster' (reason: Operation timed out after 300 second(s))

I'm Running Openstack Juno on centos 7 and i get the error when create a sahara vm with vanilla plugin .. VM was created successfully in nova and when Sahara state is starting and after some time its state is error and ERROR sahara.service.ops [-] Error during operating cluster 'test-cluster' (reason: Operation timed out after 300 second(s)) in sahara.log file

ERROR sahara.service.ops [-] Error during operating cluster 'my-cluster' (reason: Operation timed out after 300 second(s)) 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops Traceback (most recent call last): 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops File "/usr/lib/python2.7/site-packages/sahara/service/ops.py", line 113, in wrapper 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops f(cluster_id, args, *kwds) 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops File "/usr/lib/python2.7/site-packages/sahara/service/ops.py", line 206, in _provision_cluster 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops plugin.start_cluster(cluster) 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops File "/usr/lib/python2.7/site-packages/sahara/plugins/vanilla/plugin.py", line 52, in start_cluster 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops cluster.hadoop_version).start_cluster(cluster) 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops File "/usr/lib/python2.7/site-packages/sahara/plugins/vanilla/v2_4_1/versionhandler.py", line 80, in start_clus$ 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops run.await_datanodes(cluster) 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops File "/usr/lib/python2.7/site-packages/sahara/plugins/vanilla/hadoop2/run_scripts.py", line 149, in await_datan$ 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops if _check_datanodes_count(r, datanodes_count): 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops File "/usr/lib/python2.7/site-packages/sahara/plugins/vanilla/hadoop2/run_scripts.py", line 170, in _check_data$ 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops 'sudo su -lc "hadoop dfsadmin -report" hadoop | ' 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops File "/usr/lib/python2.7/site-packages/sahara/utils/ssh_remote.py", line 411, in execute_command 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops get_stderr, raise_when_error) 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops File "/usr/lib/python2.7/site-packages/sahara/utils/ssh_remote.py", line 480, in _run_s 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops return self._run_with_log(func, timeout, args, *kwargs) 2015-06-04 16:25:58.816 1557 TRACE sahara.service.ops File "/usr/lib/python2.7/site-packages/sahara/utils/ssh_remote.py", line 368, in _run_with_log

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