[SUPPORT] Current state of Java 17 support

[mzheng-plaid]

I saw https://issues.apache.org/jira/browse/HUDI-6506 ("Java 11 and 17 support with Hudi") and it seems like this is only targeted towards 1.x release, though it seems like some work has been completed already for certifying runtime/compile support for Hudi on Java 17:

#9136 - it seems like CI has been running against Java 17 since 0.14.0
#11604 - "Make Hudi compilable with Java 17"

1. What is the current state of Java 17 support for 0.14.x, 0.15.x, etc? We've done some tests on EMR and there's been no issues (and significant perf improvements in some test workloads), but wanted to check if there are any known issues.
2. Has the EMR team backported Java 17 support to their forks of Hudi? On EMR 7.x the default JVM became Java 17 - is Hudi certified to work with Java 17 on EMR?

[mzheng-plaid]

@CTTY I saw you worked on supporting Java 17 in those tickets - is this something you could help answer? Appreciate the work on this

[CTTY]

Hi @mzheng-plaid, we've certified Java 17 runtime support since 0.14 and we haven't noticed any major issues so far. Java 17 compilation time has been done as well: #11604 . But the default Java version stays to be Java 8.

On EMR, Hudi 0.14/0.15 run on Java 17 by default.

Hopefully this can help answer the ask. Please feel free to create a ticket to EMR Hudi team if you have more questions regarding Hudi on EMR

[mzheng-plaid]

Thanks appreciate the answer @CTTY that's very helpful