sarutak opened a new pull request #29265:
URL: https://github.com/apache/spark/pull/29265
### What changes were proposed in this pull request?
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This PR proposes to change the behavior of DataTable for stage-page and
executors-page not to save the previous search text.
### Why are the changes needed?
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DataTable is used in stage-page and executors-page for pagination and filter
tasks/executors by search text.
In the current implementation, search text is saved so if we visit
stage-page for a job, the previous search text is filled in the textbox and the
task table is filtered.
I'm sometimes surprised by this behavior as the stage-page lists no tasks
because tasks are filtered by the previous search text.
I think, it's not useful.
### Does this PR introduce _any_ user-facing change?
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Yes. Search text is no longer saved.
### How was this patch tested?
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New testcase with the following command.
```
$ build/sbt -Dguava.version=27.0-jre -Dtest.default.exclude.tags=
-Dspark.test.webdriver.chrome.driver=/path/to/chromedriver "testOnly
org.apache.spark.ui.ChromeUISeleniumSuite -- -z Search"
```
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