[jira] [Created] (FLINK-27056) "pipeline.time-characteristic" should be deprecated and have EVENT_TIME as default value

["Zhanghao Chen (Jira)" <ji...@apache.org>]

Zhanghao Chen created FLINK-27056:
-------------------------------------

             Summary: "pipeline.time-characteristic" should be deprecated and have EVENT_TIME as default value
                 Key: FLINK-27056
                 URL: https://issues.apache.org/jira/browse/FLINK-27056
             Project: Flink
          Issue Type: Bug
          Components: Runtime / Configuration
    Affects Versions: 1.14.4, 1.13.6, 1.12.7, 1.15.0
            Reporter: Zhanghao Chen
             Fix For: 1.16.0


*Background*
 # pipeline.time-characteristic is the configuration option used to control the time characteristic for all created streams, and has the default value _PROCESSING_TIME_ at the point of writing. However, the configuration option won't take effect unless it is explicitly set by user as we read it into the code by configurtion.getOptional(xx).ifPresent(xx).
 # The default value of _TIME_CHARACTERISTIC_ has been changed from _PROCESSING_TIME_ to _EVENT_TIME_ in [FLINK-19317] Make EventTime the default StreamTimeCharacteristic - ASF JIRA (apache.org)
 # _TIME_CHARACTERISTIC_ and the relevant operations that set or uses it have been deprecated in [FLINK-19318] Deprecate timeWindow() operations in DataStream API - ASF JIRA (apache.org) and [FLINK-19319] Deprecate StreamExecutionEnvironment.setStreamTimeCharacteristic() and TimeCharacteristic - ASF JIRA (apache.org)

*Proposed Change*
 # {*}{*}pipeline.time-characteristic should be deprecated, just like other _TIME_CHARACTERISTIC_ related operations as we no longer want user to set this.
 # pipeline.time-characteristic should have the default value of {_}EVENT_TIME{_}, to reflect the actual default value in system, and avoid misleading users.

Additionally, I think all configuration options which only take effect when it is explicitly set by user (aka those read into the system by configurtion.getOptional(xx).ifPresent(xx)), should have no default values.



--
This message was sent by Atlassian Jira
(v8.20.1#820001)