[jira] [Work logged] (HIVE-25976) Cleaner may remove files being accessed from a fetch-task-converted reader

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-25976?focusedWorklogId=784077&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-784077 ]

ASF GitHub Bot logged work on HIVE-25976:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 23/Jun/22 08:43
            Start Date: 23/Jun/22 08:43
    Worklog Time Spent: 10m 
      Work Description: pvary commented on code in PR #3289:
URL: https://github.com/apache/hive/pull/3289#discussion_r904745124


##########
iceberg/iceberg-handler/src/test/java/org/apache/iceberg/mr/hive/TestHiveIcebergTimeTravel.java:
##########
@@ -50,10 +49,14 @@ public void testSelectAsOfTimestamp() throws IOException, InterruptedException {
 
     Assert.assertEquals(4, rows.size());
 
-    AssertHelpers.assertThrows("should throw exception", IllegalArgumentException.class,
-        "java.lang.IllegalArgumentException: Cannot find a snapshot older than 1970-01-01", () -> {
-        shell.executeStatement("SELECT * FROM customers FOR SYSTEM_TIME AS OF '1970-01-01 00:00:00'");
-        });
+    try {

Review Comment:
   Why is this change?





Issue Time Tracking
-------------------

    Worklog Id:     (was: 784077)
    Time Spent: 20m  (was: 10m)

> Cleaner may remove files being accessed from a fetch-task-converted reader
> --------------------------------------------------------------------------
>
>                 Key: HIVE-25976
>                 URL: https://issues.apache.org/jira/browse/HIVE-25976
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Zoltan Haindrich
>            Assignee: László Végh
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: fetch_task_conv_compactor_test.patch
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> in a nutshell the following happens:
> * query is compiled in fetch-task-converted mode
> * no real execution happens....but the locks are released
> * the HS2 is communicating with the client and uses the fetch-task to get the rows - which in this case will directly read files from the table's directory....
> * client sleeps between reads - so there is ample time for other events...
> * cleaner wakes up and removes some files....
> * in the next read the fetch-task encounters a read error...



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