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https://issues.apache.org/jira/browse/HUDI-1138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17387761#comment-17387761
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ASF GitHub Bot commented on HUDI-1138:
--------------------------------------

yihua commented on a change in pull request #3233:
URL: https://github.com/apache/hudi/pull/3233#discussion_r677110192



##########
File path: 
hudi-timeline-service/src/main/java/org/apache/hudi/timeline/service/TimelineService.java
##########
@@ -52,36 +53,50 @@
 
   private int serverPort;
   private Configuration conf;
+  private transient HoodieEngineContext context;
   private transient FileSystem fs;
   private transient Javalin app = null;
   private transient FileSystemViewManager fsViewsManager;
   private final int numThreads;
   private final boolean shouldCompressOutput;
   private final boolean useAsync;
+  private final int markerBatchNumThreads;

Review comment:
       These have been included in the TimelineService.Config and we use the 
config instance to pass all config values.




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> Re-implement marker files via timeline server
> ---------------------------------------------
>
>                 Key: HUDI-1138
>                 URL: https://issues.apache.org/jira/browse/HUDI-1138
>             Project: Apache Hudi
>          Issue Type: Improvement
>          Components: Writer Core
>    Affects Versions: 0.9.0
>            Reporter: Vinoth Chandar
>            Assignee: Ethan Guo
>            Priority: Blocker
>              Labels: pull-request-available
>             Fix For: 0.9.0
>
>
> Even as you can argue that RFC-15/consolidated metadata, removes the need for 
> deleting partial files written due to spark task failures/stage retries. It 
> will still leave extra files inside the table (and users will pay for it 
> every month) and we need the marker mechanism to be able to delete these 
> partial files. 
> Here we explore if we can improve the current marker file mechanism, that 
> creates one marker file per data file written, by 
> Delegating the createMarker() call to the driver/timeline server, and have it 
> create marker metadata into a single file handle, that is flushed for 
> durability guarantees
>  
> P.S: I was tempted to think Spark listener mechanism can help us deal with 
> failed tasks, but it has no guarantees. the writer job could die without 
> deleting a partial file. i.e it can improve things, but cant provide 
> guarantees 



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