[hotfix][redis] fix npe cause by null host parameter

[fcb-xiaobo]

Purpose of this pull request

When the host parameter is not filled in, the config. get method will throw a null pointer exception

Does this PR introduce any user-facing change?

fix #8841

How was this patch tested?

Check list

• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/seatunnel/tree/dev/docs
• If you are contributing the connector code, please check that the following files are updated:
  1. Update plugin-mapping.properties and add new connector information in it
  2. Update the pom file of seatunnel-dist
  3. Add ci label in label-scope-conf
  4. Add e2e testcase in seatunnel-e2e
  5. Update connector plugin_config
• Update the release-note.

[Hisoka-X]

When the host parameter is not filled in, the config. get method will throw a null pointer exception

Could you provide the error stack?

[fcb-xiaobo]

When the host parameter is not filled in, the config. get method will throw a null pointer exception

Could you provide the error stack?

stack info
Exception in thread "main" org.apache.seatunnel.core.starter.exception.CommandExecuteException: SeaTunnel job executed failed
at org.apache.seatunnel.core.starter.seatunnel.command.ClientExecuteCommand.execute(ClientExecuteCommand.java:228)
at org.apache.seatunnel.core.starter.SeaTunnel.run(SeaTunnel.java:40)
at org.apache.seatunnel.example.engine.SeaTunnelEngineLocalExample.main(SeaTunnelEngineLocalExample.java:52)
Caused by: org.apache.seatunnel.api.table.factory.FactoryException: ErrorCode:[API-06], ErrorDescription:[Factory initialize failed] - Unable to create a source for identifier 'Redis'.
at org.apache.seatunnel.api.table.factory.FactoryUtil.restoreAndPrepareSource(FactoryUtil.java:168)
at org.apache.seatunnel.api.table.factory.FactoryUtil.createAndPrepareSource(FactoryUtil.java:86)
at org.apache.seatunnel.engine.core.parse.MultipleTableJobConfigParser.parseSource(MultipleTableJobConfigParser.java:376)
at org.apache.seatunnel.engine.core.parse.MultipleTableJobConfigParser.parse(MultipleTableJobConfigParser.java:227)
at org.apache.seatunnel.engine.client.job.ClientJobExecutionEnvironment.getLogicalDag(ClientJobExecutionEnvironment.java:123)
at org.apache.seatunnel.engine.client.job.ClientJobExecutionEnvironment.execute(ClientJobExecutionEnvironment.java:191)
at org.apache.seatunnel.core.starter.seatunnel.command.ClientExecuteCommand.execute(ClientExecuteCommand.java:165)
... 2 more
Caused by: java.lang.NullPointerException
at org.apache.seatunnel.connectors.seatunnel.redis.config.RedisParameters.buildWithConfig(RedisParameters.java:72)
at org.apache.seatunnel.connectors.seatunnel.redis.source.RedisSource.(RedisSource.java:56)
at org.apache.seatunnel.connectors.seatunnel.redis.source.RedisSourceFactory.lambda$createSource$0(RedisSourceFactory.java:45)
at org.apache.seatunnel.api.table.factory.FactoryUtil.createAndPrepareSource(FactoryUtil.java:180)
at org.apache.seatunnel.api.table.factory.FactoryUtil.restoreAndPrepareSource(FactoryUtil.java:136)
... 8 more
[] 2025-03-03 18:10:02,703 DEBUG org.apache.hadoop.util.ShutdownHookManager - ShutdownHookManger completed shutdown.
Disconnected from the target VM, address: '127.0.0.1:55053', transport: 'socket'

Process finished with exit code 1

[Hisoka-X]

Maybe change port from int to Integer is a better option. https://github.com/apache/seatunnel/pull/8881/files#diff-85c72df044b54265682571cdb07752eb396fdf68965cbcf863553efa9a22b34fR49

[fcb-xiaobo]

Maybe change port from int to Integer is a better option. https://github.com/apache/seatunnel/pull/8881/files#diff-85c72df044b54265682571cdb07752eb396fdf68965cbcf863553efa9a22b34fR49

Okay, thank you for your suggestion. After rounding it to Integer, I can run it locally

[Hisoka-X]

Let's add some test case for RedisParameters.

[liunaijie]

How about update it to redis default port 6379.

[Hisoka-X]

How about update it to redis default port 6379.

In cluster mode it should be null.

[liunaijie]

How about update it to redis default port 6379.

In cluster mode it should be null.

In cluster moe, it won't be use
https://github.com/apache/seatunnel/pull/8841/files#diff-85c72df044b54265682571cdb07752eb396fdf68965cbcf863553efa9a22b34fR175

[Hisoka-X]

OK, let's update it to 6379 as default. @fcb-xiaobo

[fcb-xiaobo]

Okay, thank you for your suggestions. I will update the code and documentation later