[jira] [Commented] (FLINK-16013) List config option could not be parsed correctly

["Yang Wang (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-16013?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17035164#comment-17035164 ] 

Yang Wang commented on FLINK-16013:
-----------------------------------

cc [~kkloudas] 

I think the {{PipelineOptions#JARS, PipelineOptions#CLASSPATHS, etc.}} could not be parsed correctly.

> List config option could not be parsed correctly
> ------------------------------------------------
>
>                 Key: FLINK-16013
>                 URL: https://issues.apache.org/jira/browse/FLINK-16013
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Configuration
>            Reporter: Yang Wang
>            Priority: Major
>
> Currently, if a config option is {{List}} type and written to a flink-conf.yaml, it could not be parsed correctly when reloaded from yaml resource. The root cause is we use {{List#toString}} to save into the yaml resource. However, when we want to parse a List from a string, we use semicolon to split the value.
>  
> The following is a unit test to reproduce this problem.
> {code:java}
> public void testWriteConfigurationAndReload() throws IOException {
>  final File flinkConfDir = temporaryFolder.newFolder().getAbsoluteFile();
>  final Configuration flinkConfig = new Configuration();
>  final ConfigOption<List<String>> listConfigOption = ConfigOptions
>   .key("test-list-string-key")
>   .stringType()
>   .asList()
>   .noDefaultValue();
>  final List<String> values = Arrays.asList("value1", "value2", "value3");
>  flinkConfig.set(listConfigOption, values);
>  assertThat(values, Matchers.containsInAnyOrder(flinkConfig.get(listConfigOption).toArray()));
>  BootstrapTools.writeConfiguration(flinkConfig, new File(flinkConfDir, "flink-conf.yaml"));
>  final Configuration loadedFlinkConfig = GlobalConfiguration.loadConfiguration(flinkConfDir.getAbsolutePath());
>  assertThat(values, Matchers.containsInAnyOrder(loadedFlinkConfig.get(listConfigOption).toArray()));
> }
> {code}



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