[TEZ-2630] TezChild receives IP address instead of FQDN

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.5.0, 0.6.0, 0.7.0
• Fix Version/s: 0.8.0-alpha, 0.7.1, 0.5.5, 0.6.3
• Assignee: Hitesh Shah
• Reporter: Rajat Jain
• Created: 21/Jul/15 18:31
• Updated: 01/Sep/15 21:31
• Resolved: 05/Aug/15 21:47

Description

I am running a yarn cluster on AWS. The slave nodes (NMs) are all configured to listen on private DNS. For example, a sample node manager listens on ip-10-16-141-168.ec2.internal:8042.

When I'm trying to run a Tez job (even simple ones like select count from nation) - they fail because child tasks are unable to connect to the AM. The issue is they are trying to connect to the IP instead of the private DNS. Here's a sample log line (couple of them added by me for debugging):

2015-07-21 17:08:21,919 INFO [main] task.TezChild: TezChild starting
2015-07-21 17:08:22,310 INFO [main] task.TezChild: Using socket factory class: org.apache.hadoop.net.StandardSocketFactory
2015-07-21 17:08:22,336 INFO [main] task.TezChild: PID, containerIdentifier:  3699, container_1437498369268_0001_01_000002
2015-07-21 17:08:22,418 INFO [main] Configuration.deprecation: fs.default.name is deprecated. Instead, use fs.defaultFS
2015-07-21 17:08:23,025 INFO [main] task.TezChild: Got host:port: 10.16.141.168:37949
2015-07-21 17:08:23,035 INFO [main] task.TezChild: address variables: 10.16.141.168:37949
2015-07-21 17:08:23,143 INFO [TezChild] task.ContainerReporter: Attempting to fetch new task
2015-07-21 17:08:24,201 INFO [TezChild] ipc.Client: Retrying connect to server: 10.16.141.168/10.16.141.168:37949. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=50, sleepTime=1000 MILLISECONDS)
2015-07-21 17:08:25,202 INFO [TezChild] ipc.Client: Retrying connect to server: 10.16.141.168/10.16.141.168:37949. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=50, sleepTime=1000 MILLISECONDS)
2015-07-21 17:08:26,757 INFO [TezChild] ipc.Client: Retrying connect to server: 10.16.141.168/10.16.141.168:37949. Already tried 2 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=50, sleepTime=1000 MILLISECONDS)
2015-07-21 17:08:27,758 INFO [TezChild] ipc.Client: Retrying connect to server: 10.16.141.168/10.16.141.168:37949. Already tried 3 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=50, sleepTime=1000 MILLISECONDS)

AM is listening at the right address. But TezChild is receiving the IP address instead of the private DNS.

AM logs:

2015-07-21 18:09:27,906 INFO [ServiceThread:org.apache.tez.dag.app.TaskAttemptListenerImpTezDag] app.TaskAttemptListenerImpTezDag: Listening at address: ip-10-234-2-80.ec2.internal:49967

TezChild logs:

2015-07-21 18:09:35,353 INFO [main] task.TezChild: TezChild starting
2015-07-21 18:09:35,379 INFO [main] task.TezChild: Args: 10.234.2.80,49967,container_1437501941642_0001_01_000002,application_1437501941642_0001,1
2015-07-21 18:09:35,770 INFO [main] task.TezChild: Using socket factory class: org.apache.hadoop.net.StandardSocketFactory
2015-07-21 18:09:35,785 INFO [main] task.TezChild: PID, containerIdentifier:  8670, container_1437501941642_0001_01_000002
2015-07-21 18:09:35,864 INFO [main] Configuration.deprecation: fs.default.name is deprecated. Instead, use fs.defaultFS
2015-07-21 18:09:36,403 INFO [main] task.TezChild: Got host:port: 10.234.2.80:49967
2015-07-21 18:09:36,413 INFO [main] task.TezChild: address variables: 10.234.2.80:49967