Yang Wang created FLINK-16013:
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Summary: 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
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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