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Posted to dev@ambari.apache.org by "Siddharth Wagle (JIRA)" <ji...@apache.org> on 2013/04/12 21:20:16 UTC

[jira] [Commented] (AMBARI-1915) Client install tasks are shown twice in install progress popup

    [ https://issues.apache.org/jira/browse/AMBARI-1915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13630520#comment-13630520 ] 

Siddharth Wagle commented on AMBARI-1915:
-----------------------------------------

Unit test:

org.apache.ambari.server.controller.AmbariManagementControllerTest#testReConfigureServiceClient
                
> Client install tasks are shown twice in install progress popup
> --------------------------------------------------------------
>
>                 Key: AMBARI-1915
>                 URL: https://issues.apache.org/jira/browse/AMBARI-1915
>             Project: Ambari
>          Issue Type: Bug
>          Components: controller
>    Affects Versions: 1.3.0
>            Reporter: Siddharth Wagle
>            Assignee: Siddharth Wagle
>             Fix For: 1.3.0
>
>         Attachments: AMBARI-1915.patch, Screen Shot 2013-04-11 at 9.12.28 PM.png
>
>
> Client is re-configured by re-installing all client only hosts. This results in multiple tasks for client install in the UI.
> API response:
> {noformat}
> {
>   "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2",
>   "Requests" : {
>     "id" : 2,
>     "cluster_name" : "yusaku"
>   },
>   "tasks" : [
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/43",
>       "Tasks" : {
>         "exit_code" : 0,
>         "stdout" : "notice: /Stage[2]/Hdp-oozie/Configgenerator::Configfile[oozie-site]/File[/etc/oozie/conf/oozie-site.xml]/content: content changed '{md5}eaf59cc452c92e64b559071586150a08' to '{md5}cb15303aab1c384d19c102a6ce650ed2'\nnotice: Finished catalog run in 2.04 seconds",
>         "status" : "COMPLETED",
>         "stderr" : "none",
>         "host_name" : "ip-10-40-19-235.ec2.internal",
>         "id" : 43,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "INSTALL",
>         "role" : "OOZIE_CLIENT",
>         "start_time" : 1365743356709,
>         "stage_id" : 1
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/51",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "QUEUED",
>         "stderr" : "",
>         "host_name" : "ip-10-40-19-235.ec2.internal",
>         "id" : 51,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "GANGLIA_MONITOR",
>         "start_time" : 1365743407043,
>         "stage_id" : 2
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/41",
>       "Tasks" : {
>         "exit_code" : 0,
>         "stdout" : "notice: Finished catalog run in 2.22 seconds",
>         "status" : "COMPLETED",
>         "stderr" : "none",
>         "host_name" : "ip-10-40-19-235.ec2.internal",
>         "id" : 41,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "INSTALL",
>         "role" : "HCAT",
>         "start_time" : 1365743356684,
>         "stage_id" : 1
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/54",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "QUEUED",
>         "stderr" : "",
>         "host_name" : "ip-10-80-81-236.ec2.internal",
>         "id" : 54,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "GANGLIA_SERVER",
>         "start_time" : 1365743407078,
>         "stage_id" : 2
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/55",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "QUEUED",
>         "stderr" : "",
>         "host_name" : "ip-10-80-81-236.ec2.internal",
>         "id" : 55,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "NAGIOS_SERVER",
>         "start_time" : 1365743407100,
>         "stage_id" : 2
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/50",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "QUEUED",
>         "stderr" : "",
>         "host_name" : "ip-10-40-19-235.ec2.internal",
>         "id" : 50,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "DATANODE",
>         "start_time" : 1365743407032,
>         "stage_id" : 2
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/67",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "PENDING",
>         "stderr" : "",
>         "host_name" : "ip-10-40-19-235.ec2.internal",
>         "id" : 67,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 0,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "HBASE_REGIONSERVER",
>         "start_time" : -1,
>         "stage_id" : 4
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/47",
>       "Tasks" : {
>         "exit_code" : 0,
>         "stdout" : "warning: Dynamic lookup of $hadoop_heapsize is deprecated.  Support will be removed in Puppet 2.8.  Use a fully-qualified variable name (e.g., $classname::variable) or parameterized classes.\nnotice: /Stage[2]/Hdp-hive/Configgenerator::Configfile[hive-site]/File[/etc/hive/conf/hive-site.xml]/content: content changed '{md5}29d1def766d4aadfddbf38db13a2712e' to '{md5}2d26829fd012bf5f195e760fc8eeb7f9'\nnotice: Finished catalog run in 2.84 seconds",
>         "status" : "COMPLETED",
>         "stderr" : "none",
>         "host_name" : "ip-10-80-81-236.ec2.internal",
>         "id" : 47,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "INSTALL",
>         "role" : "HIVE_CLIENT",
>         "start_time" : 1365743356758,
>         "stage_id" : 1
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/45",
>       "Tasks" : {
>         "exit_code" : 0,
>         "stdout" : "notice: Finished catalog run in 2.24 seconds",
>         "status" : "COMPLETED",
>         "stderr" : "none",
>         "host_name" : "ip-10-40-19-235.ec2.internal",
>         "id" : 45,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "INSTALL",
>         "role" : "SQOOP",
>         "start_time" : 1365743356733,
>         "stage_id" : 1
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/44",
>       "Tasks" : {
>         "exit_code" : 0,
>         "stdout" : "notice: Finished catalog run in 2.13 seconds",
>         "status" : "COMPLETED",
>         "stderr" : "none",
>         "host_name" : "ip-10-40-19-235.ec2.internal",
>         "id" : 44,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "INSTALL",
>         "role" : "PIG",
>         "start_time" : 1365743356721,
>         "stage_id" : 1
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/56",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "QUEUED",
>         "stderr" : "",
>         "host_name" : "ip-10-80-81-236.ec2.internal",
>         "id" : 56,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "NAMENODE",
>         "start_time" : 1365743407109,
>         "stage_id" : 2
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/52",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "QUEUED",
>         "stderr" : "",
>         "host_name" : "ip-10-40-19-235.ec2.internal",
>         "id" : 52,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "ZOOKEEPER_SERVER",
>         "start_time" : 1365743407062,
>         "stage_id" : 2
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/42",
>       "Tasks" : {
>         "exit_code" : 0,
>         "stdout" : "warning: Dynamic lookup of $hadoop_heapsize is deprecated.  Support will be removed in Puppet 2.8.  Use a fully-qualified variable name (e.g., $classname::variable) or parameterized classes.\nnotice: /Stage[2]/Hdp-hive/Configgenerator::Configfile[hive-site]/File[/etc/hive/conf/hive-site.xml]/content: content changed '{md5}27e517fec40f6157f75eb3116d5387bf' to '{md5}54ff14d0a6d9968e900f28853125b294'\nnotice: Finished catalog run in 2.28 seconds",
>         "status" : "COMPLETED",
>         "stderr" : "none",
>         "host_name" : "ip-10-40-19-235.ec2.internal",
>         "id" : 42,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "INSTALL",
>         "role" : "HIVE_CLIENT",
>         "start_time" : 1365743356697,
>         "stage_id" : 1
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/63",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "PENDING",
>         "stderr" : "",
>         "host_name" : "ip-10-80-81-236.ec2.internal",
>         "id" : 63,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 0,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "HBASE_MASTER",
>         "start_time" : -1,
>         "stage_id" : 3
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/62",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "PENDING",
>         "stderr" : "",
>         "host_name" : "ip-10-40-19-235.ec2.internal",
>         "id" : 62,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 0,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "TASKTRACKER",
>         "start_time" : -1,
>         "stage_id" : 3
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/46",
>       "Tasks" : {
>         "exit_code" : 0,
>         "stdout" : "notice: Finished catalog run in 2.77 seconds",
>         "status" : "COMPLETED",
>         "stderr" : "none",
>         "host_name" : "ip-10-80-81-236.ec2.internal",
>         "id" : 46,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "INSTALL",
>         "role" : "HCAT",
>         "start_time" : 1365743356744,
>         "stage_id" : 1
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/58",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "QUEUED",
>         "stderr" : "",
>         "host_name" : "ip-10-85-70-140.ec2.internal",
>         "id" : 58,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "GANGLIA_MONITOR",
>         "start_time" : 1365743407125,
>         "stage_id" : 2
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/60",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "QUEUED",
>         "stderr" : "",
>         "host_name" : "ip-10-85-70-140.ec2.internal",
>         "id" : 60,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "ZOOKEEPER_SERVER",
>         "start_time" : 1365743407164,
>         "stage_id" : 2
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/69",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "PENDING",
>         "stderr" : "",
>         "host_name" : "ip-10-85-70-140.ec2.internal",
>         "id" : 69,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 0,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "OOZIE_SERVER",
>         "start_time" : -1,
>         "stage_id" : 4
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/64",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "PENDING",
>         "stderr" : "",
>         "host_name" : "ip-10-85-70-140.ec2.internal",
>         "id" : 64,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 0,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "HIVE_METASTORE",
>         "start_time" : -1,
>         "stage_id" : 3
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/48",
>       "Tasks" : {
>         "exit_code" : 0,
>         "stdout" : "warning: Dynamic lookup of $service_state at /var/lib/ambari-agent/puppet/modules/hdp-hadoop/manifests/init.pp:213 is deprecated.  Support will be removed in Puppet 2.8.  Use a fully-qualified variable name (e.g., $classname::variable) or parameterized classes.\nwarning: Dynamic lookup of $tasktracker_port is deprecated.  Support will be removed in Puppet 2.8.  Use a fully-qualified variable name (e.g., $classname::variable) or parameterized classes.\nwarning: Dynamic lookup of $ambari_db_rca_url is deprecated.  Support will be removed in Puppet 2.8.  Use a fully-qualified variable name (e.g., $classname::variable) or parameterized classes.\nwarning: Dynamic lookup of $ambari_db_rca_driver is deprecated.  Support will be removed in Puppet 2.8.  Use a fully-qualified variable name (e.g., $classname::variable) or parameterized classes.\nwarning: Dynamic lookup of $ambari_db_rca_username is deprecated.  Support will be removed in Puppet 2.8.  Use a fully-qualified variable name (e.g., $classname::variable) or parameterized classes.\nwarning: Dynamic lookup of $ambari_db_rca_password is deprecated.  Support will be removed in Puppet 2.8.  Use a fully-qualified variable name (e.g., $classname::variable) or parameterized classes.\nnotice: /Stage[2]/Hdp-hadoop::Initialize/Configgenerator::Configfile[core-site]/File[/etc/hadoop/conf/core-site.xml]/content: content changed '{md5}95bdcddd064261ac3a00d8c0a7f79fee' to '{md5}d6f5b9646bf280e915e3b0d42ed622a9'\nnotice: /Stage[2]/Hdp-hadoop::Initialize/Configgenerator::Configfile[hdfs-site]/File[/etc/hadoop/conf/hdfs-site.xml]/content: content changed '{md5}5f83b57cbac46a0b7007ed94720a8c3b' to '{md5}e0e38c4dc10fc81b12637e34796ced70'\nnotice: /Stage[2]/Hdp-hadoop::Initialize/Configgenerator::Configfile[mapred-site]/File[/etc/hadoop/conf/mapred-site.xml]/content: content changed '{md5}42b54b8e096eafa7ba53c8f5b53bda3e' to '{md5}409f4680bc7871db2864afecbcefdb36'\nnotice: Finished catalog run in 3.67 seconds",
>         "status" : "COMPLETED",
>         "stderr" : "none",
>         "host_name" : "ip-10-80-81-236.ec2.internal",
>         "id" : 48,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "INSTALL",
>         "role" : "MAPREDUCE_CLIENT",
>         "start_time" : 1365743356769,
>         "stage_id" : 1
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/70",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "PENDING",
>         "stderr" : "",
>         "host_name" : "ip-10-85-70-140.ec2.internal",
>         "id" : 70,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 0,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "WEBHCAT_SERVER",
>         "start_time" : -1,
>         "stage_id" : 5
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/61",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "PENDING",
>         "stderr" : "",
>         "host_name" : "ip-10-40-19-235.ec2.internal",
>         "id" : 61,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 0,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "HBASE_MASTER",
>         "start_time" : -1,
>         "stage_id" : 3
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/66",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "PENDING",
>         "stderr" : "",
>         "host_name" : "ip-10-85-70-140.ec2.internal",
>         "id" : 66,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 0,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "SECONDARY_NAMENODE",
>         "start_time" : -1,
>         "stage_id" : 3
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/49",
>       "Tasks" : {
>         "exit_code" : 0,
>         "stdout" : "notice: /Stage[2]/Hdp-oozie/Configgenerator::Configfile[oozie-site]/File[/etc/oozie/conf/oozie-site.xml]/content: content changed '{md5}001c4940080d2ea315a9720676f1bcad' to '{md5}282f1e354fe7f9da0f6de43425a40d40'\nnotice: Finished catalog run in 2.24 seconds",
>         "status" : "COMPLETED",
>         "stderr" : "none",
>         "host_name" : "ip-10-80-81-236.ec2.internal",
>         "id" : 49,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "INSTALL",
>         "role" : "OOZIE_CLIENT",
>         "start_time" : 1365743356796,
>         "stage_id" : 1
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/53",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "QUEUED",
>         "stderr" : "",
>         "host_name" : "ip-10-80-81-236.ec2.internal",
>         "id" : 53,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "GANGLIA_MONITOR",
>         "start_time" : 1365743407070,
>         "stage_id" : 2
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/68",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "PENDING",
>         "stderr" : "",
>         "host_name" : "ip-10-85-70-140.ec2.internal",
>         "id" : 68,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 0,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "HIVE_SERVER",
>         "start_time" : -1,
>         "stage_id" : 4
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/65",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "PENDING",
>         "stderr" : "",
>         "host_name" : "ip-10-85-70-140.ec2.internal",
>         "id" : 65,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 0,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "JOBTRACKER",
>         "start_time" : -1,
>         "stage_id" : 3
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/57",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "QUEUED",
>         "stderr" : "",
>         "host_name" : "ip-10-80-81-236.ec2.internal",
>         "id" : 57,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "ZOOKEEPER_SERVER",
>         "start_time" : 1365743407117,
>         "stage_id" : 2
>       }
>     },
>     {
>       "href" : "http://ec2-50-17-99-21.compute-1.amazonaws.com:8080/api/v1/clusters/yusaku/requests/2/tasks/59",
>       "Tasks" : {
>         "exit_code" : 999,
>         "stdout" : "",
>         "status" : "QUEUED",
>         "stderr" : "",
>         "host_name" : "ip-10-85-70-140.ec2.internal",
>         "id" : 59,
>         "cluster_name" : "yusaku",
>         "attempt_cnt" : 1,
>         "request_id" : 2,
>         "command" : "START",
>         "role" : "MYSQL_SERVER",
>         "start_time" : 1365743407156,
>         "stage_id" : 2
>       }
>     }
>   ]
> }
> {noformat}

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