Hi Siddharth,
This should be a bug and I opened jira AMBARI-10515 for it. I am making a patch for it(actually almost complete it and now am considering the impact to other existing invocations), so could you please help assign this jira to me? Thanks! At 2015-04-16 14:34:03, "Qi Yun Liu" <[email protected]> wrote: Hi Siddharth, Thanks a lot for your comments! According to your suggestions， I did a test: 1. Launch Ambari server GUI and start a brand new cluster installation 2. In 'Assign Slaves and Clients' page, select two hosts(hostname0.com, hostname1.com) as the datanodes 3. After clicking Next button, I found in the ambari-server/resources/stacks/HDP/2.2/services/stack_advisor.py#HDP22StackAdvisor#recommendHDFSConfigurations, the value of datanodeHosts got by line 'datanodeHosts = self.getHostsWithComponent("HDFS", "DATANODE", services, hosts)' only includes 1 host info as below and its length is 1 not 2: datanodeHosts= [{u'href': u'/api/v1/hosts/hostname1.com', u'Hosts': {u'last_heartbeat_time': 1429155431532, u'recovery_summary': u'DISABLED', u'host_health_report': u'', u'disk_info': [{u'available': u'83808976', u'used': u'7951800', u'percent': u'9%', u'device': u'/dev/mapper/vg_sdsvm923094-lv_root', u'mountpoint': u'/', u'type': u'ext4', u'size': u'96671468'}, {u'available': u'4031416', u'used': u'0', u'percent': u'0%', u'device': u'tmpfs', u'mountpoint': u'/dev/shm', u'type': u'tmpfs', u'size': u'4031416'}, {u'available': u'378216', u'used': u'92028', u'percent': u'20%', u'device': u'/dev/sda1', u'mountpoint': u'/boot', u'type': u'ext4', u'size': u'495844'}], u'desired_configs': None, u'cpu_count': 2, u'recovery_report': {u'component_reports': [], u'summary': u'DISABLED'}, u'host_state': u'HEALTHY', u'os_arch': u'x86_64', u'total_mem': 8062836, u'host_status': u'HEALTHY', u'last_registration_time': 1429153847302, u'os_family': u'redhat6', u'host_name': u'hostname1.com', u'ip': u'9.30.249.190', u'rack_info': u'/default-rack', u'os_type': u'redhat6', u'last_agent_env': {u'transparentHugePage': u'never', u'hostHealth': {u'agentTimeStampAtReporting': 1429155391291, u'activeJavaProcs': [], u'serverTimeStampAtReporting': 1429155391348, u'liveServices': [{u'status': u'Healthy', u'name': u'ntpd', u'desc': u''}]}, u'umask': 18, u'reverseLookup': True, u'alternatives': [], u'existingUsers': [], u'firewallName': u'iptables', u'stackFoldersAndFiles': [{u'type': u'directory', u'name': u'/etc/slider'}], u'existingRepos': [], u'installedPackages': [], u'firewallRunning': False}, u'public_host_name': u'hostname1.com', u'ph_cpu_count': 2}}] I think the correct value of datanodeHosts should not only include 'hostname1.com' but also include 'hostname0.com', and the length of datanodeHosts should be 2, but not 1, because they were all selected as datanode host. Is it a bug? At 2015-04-11 13:09:33, "Siddharth Wagle" <[email protected]> wrote: Hi Qi Yun Liu, This method is what you are looking for : stacks/HDP/2.0.6/services HDP206StackAdvisor#getHostsWithComponent Example: datanodeHosts = self.getHostsWithComponent("HDFS", "DATANODE", services, hosts) In: stacks/HDP/2.2/services/ HDP22StackAdvisor#recommendHDFSConfigurations BR, Sid From: Qi Yun Liu <[email protected]> Sent: Friday, April 10, 2015 7:13 PM To:[email protected] Subject: Re:How to get datanode numbers in stack_advisor.py#recommendHDFSConfigurations? I just wanna to get datanode numbers in stack_advisor.py#recommendHDFSConfigurations(self, configurations, clusterData)? Anyone could help me? Thanks in advance! At 2015-04-10 15:09:18, "Qi Yun Liu" <[email protected]> wrote: Hi Experts, How to get datanode numbers in stack_advisor.py#recommendHDFSConfigurations(self, configurations, clusterData)? using its input parameters 'self', 'configurations' or 'clusterData'. At the same time, another method 'def getComponentLayoutValidations(self, services, hosts)' has a input parameter 'services', so it could get nameNodeHosts using 'services', but I failed to get parameter 'services' in method recommendHDFSConfigurations. Any comments? Thanks a lot!
