Hi All, I am a noob w.r.t Hadoop. I started with the Hortonworks HDP a week earlier. I am using Oracle VirtualBox 5.2.14 and Hortonworks Sandbox HDP 2.6.5. I started Ambari using http://localhost:1080 and launching the Dashboard. It worked fine the first day and I even created a few tables in Hive. I POWERED OFF my VirtualBox that day. Since the next day when I am trying to access the dashboard, it first throws the below error. 502 Bad Gateway nginx/1.15.0 Then after a few tries, it opens the Ambari Dashboard. This happens every time. But then there are errors on the main page. Screenshot Ambari_Main. I have tried to STOP ALL and then START ALL the services. But it throws the error during the App Timeline Server Start service. stderr Traceback (most recent call last): File "/var/lib/ambari-agent/cache/common-services/YARN/2.1.0.2.0/package/scripts/application_timeline_server.py", line 89, in <module> ApplicationTimelineServer().execute() File "/usr/lib/ambari-agent/lib/resource_management/libraries/script/script.py", line 375, in execute method(env) File "/var/lib/ambari-agent/cache/common-services/YARN/2.1.0.2.0/package/scripts/application_timeline_server.py", line 43, in start self.configure(env) # FOR SECURITY File "/usr/lib/ambari-agent/lib/resource_management/libraries/script/script.py", line 120, in locking_configure original_configure(obj, *args, **kw) File "/var/lib/ambari-agent/cache/common-services/YARN/2.1.0.2.0/package/scripts/application_timeline_server.py", line 54, in configure yarn(name='apptimelineserver') File "/usr/lib/ambari-agent/lib/ambari_commons/os_family_impl.py", line 89, in thunk return fn(*args, **kwargs) File "/var/lib/ambari-agent/cache/common-services/YARN/2.1.0.2.0/package/scripts/yarn.py", line 359, in yarn mode=0755 File "/usr/lib/ambari-agent/lib/resource_management/core/base.py", line 166, in __init__ self.env.run() File "/usr/lib/ambari-agent/lib/resource_management/core/environment.py", line 160, in run self.run_action(resource, action) File "/usr/lib/ambari-agent/lib/resource_management/core/environment.py", line 124, in run_action provider_action() File "/usr/lib/ambari-agent/lib/resource_management/libraries/providers/hdfs_resource.py", line 606, in action_create_on_execute self.action_delayed("create") File "/usr/lib/ambari-agent/lib/resource_management/libraries/providers/hdfs_resource.py", line 603, in action_delayed self.get_hdfs_resource_executor().action_delayed(action_name, self) File "/usr/lib/ambari-agent/lib/resource_management/libraries/providers/hdfs_resource.py", line 330, in action_delayed self._assert_valid() File "/usr/lib/ambari-agent/lib/resource_management/libraries/providers/hdfs_resource.py", line 289, in _assert_valid self.target_status = self._get_file_status(target) File "/usr/lib/ambari-agent/lib/resource_management/libraries/providers/hdfs_resource.py", line 432, in _get_file_status list_status = self.util.run_command(target, 'GETFILESTATUS', method='GET', ignore_status_codes=['404'], assertable_result=False) File "/usr/lib/ambari-agent/lib/resource_management/libraries/providers/hdfs_resource.py", line 177, in run_command return self._run_command(*args, **kwargs) File "/usr/lib/ambari-agent/lib/resource_management/libraries/providers/hdfs_resource.py", line 237, in _run_command _, out, err = get_user_call_output(cmd, user=self.run_user, logoutput=self.logoutput, quiet=False) File "/usr/lib/ambari-agent/lib/resource_management/libraries/functions/get_user_call_output.py", line 61, in get_user_call_output raise ExecutionFailed(err_msg, code, files_output[0], files_output[1]) resource_management.core.exceptions.ExecutionFailed: Execution of 'curl -sS -L -w '%{http_code}' -X GET 'http://sandbox-hdp.hortonworks.com:50070/webhdfs/v1/ats/done?op=GETFILESTATUS&user.name=hdfs' 1>/tmp/tmpRDJltk 2>/tmp/tmpK9kAhT' returned 7. curl: (7) Failed connect to sandbox-hdp.hortonworks.com:50070; Connection refused 000 Please let me know a fix to the issue. I am stuck here for the past one week. Thanks in advance, M ... View more

I am new to Hadoop. I have installed VirtualBox 5.1.22 and HDP 2.6. After starting the sandbox, I am getting stuck at "Started Cleanup of Temporary Directories" for about 40 minutes now. I have attached the screenshots of 1. The step where I am getting stuck. 2. The VirtualBox setting 3. The VirtualBox network setting. Please advise. ... View more