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Posted to yarn-issues@hadoop.apache.org by "Adam Antal (JIRA)" <ji...@apache.org> on 2019/05/02 16:28:00 UTC
[jira] [Created] (YARN-9525) TFile format is not working against
s3a remote folder
Adam Antal created YARN-9525:
--------------------------------
Summary: TFile format is not working against s3a remote folder
Key: YARN-9525
URL: https://issues.apache.org/jira/browse/YARN-9525
Project: Hadoop YARN
Issue Type: Bug
Components: log-aggregation
Affects Versions: 3.1.2
Reporter: Adam Antal
Using the IndexedFileFormat {{yarn.nodemanager.remote-app-log-dir}} configured to an s3a URI throws the following exception during log aggregation:
{noformat}
Cannot create writer for app application_1556199768861_0001. Skip log upload this time.
java.io.IOException: java.io.FileNotFoundException: No such file or directory: s3a://adamantal-log-test/logs/systest/ifile/application_1556199768861_0001/adamantal-3.gce.cloudera.com_8041
at org.apache.hadoop.yarn.logaggregation.filecontroller.ifile.LogAggregationIndexedFileController.initializeWriter(LogAggregationIndexedFileController.java:247)
at org.apache.hadoop.yarn.server.nodemanager.containermanager.logaggregation.AppLogAggregatorImpl.uploadLogsForContainers(AppLogAggregatorImpl.java:306)
at org.apache.hadoop.yarn.server.nodemanager.containermanager.logaggregation.AppLogAggregatorImpl.doAppLogAggregation(AppLogAggregatorImpl.java:464)
at org.apache.hadoop.yarn.server.nodemanager.containermanager.logaggregation.AppLogAggregatorImpl.run(AppLogAggregatorImpl.java:420)
at org.apache.hadoop.yarn.server.nodemanager.containermanager.logaggregation.LogAggregationService$1.run(LogAggregationService.java:276)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.FileNotFoundException: No such file or directory: s3a://adamantal-log-test/logs/systest/ifile/application_1556199768861_0001/adamantal-3.gce.cloudera.com_8041
at org.apache.hadoop.fs.s3a.S3AFileSystem.s3GetFileStatus(S3AFileSystem.java:2488)
at org.apache.hadoop.fs.s3a.S3AFileSystem.innerGetFileStatus(S3AFileSystem.java:2382)
at org.apache.hadoop.fs.s3a.S3AFileSystem.getFileStatus(S3AFileSystem.java:2321)
at org.apache.hadoop.fs.DelegateToFileSystem.getFileStatus(DelegateToFileSystem.java:128)
at org.apache.hadoop.fs.FileContext$15.next(FileContext.java:1244)
at org.apache.hadoop.fs.FileContext$15.next(FileContext.java:1240)
at org.apache.hadoop.fs.FSLinkResolver.resolve(FSLinkResolver.java:90)
at org.apache.hadoop.fs.FileContext.getFileStatus(FileContext.java:1246)
at org.apache.hadoop.yarn.logaggregation.filecontroller.ifile.LogAggregationIndexedFileController$1.run(LogAggregationIndexedFileController.java:228)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1730)
at org.apache.hadoop.yarn.logaggregation.filecontroller.ifile.LogAggregationIndexedFileController.initializeWriter(LogAggregationIndexedFileController.java:195)
... 7 more
{noformat}
This stack trace point to {{LogAggregationIndexedFileController$initializeWriter}} where we do the following steps (in a non-rolling log aggregation setup):
- create FSDataOutputStream
- writing out a UUID
- flushing
- immediately after that we call a GetFileStatus to get the length of the log file (the bytes we just wrote out), and that's where the failures happens: the file is not there yet due to eventual consistency.
Maybe we can get rid of that, so we can use IFile format against a s3a target.
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