[SPARK-27215][CORE] Correct the kryo configurations

[LantaoJin]

What changes were proposed in this pull request?

valKRYO_USE_UNSAFE=ConfigBuilder("spark.kyro.unsafe")
.booleanConf
.createWithDefault(false)
valKRYO_USE_POOL=ConfigBuilder("spark.kyro.pool")
.booleanConf
.createWithDefault(true)

kyro should be kryo

How was this patch tested?

no need

[LantaoJin]

@vanzin@squito@gatorsmile, could you have a time to review this?

[attilapiros]

LGTM

I have checked the typo was introduced by #23532 which went into 3.0.0-SNAPSHOT and anyway the whole Kryo pool (along with this config) was introduced only in 3.0.0-SNAPSHOT.

Moreover there is no more reference to the incorrect spelling:

attilapiros@apiros-MBP ~/github/spark (pr/24156) $ find . \( -name "*.scala" -or -name "*.java" \) -exec grep -i "kyro" \{} \; -print
attilapiros@apiros-MBP ~/github/spark (pr/24156) $

[gaborgsomogyi]

LGTM.

[jiangxb1987]

Does this change means the previous config key will no longer be recognized?

[vanzin]

Does this change means the previous config key will no longer be recognized?

The "previous" config key never existed, it was a typo in a recent change.

[jiangxb1987]

Does this change means the previous config key will no longer be recognized?

The "previous" config key never existed, it was a typo in a recent change.

Thanks, sounds good!

[dongjoon-hyun]

cc @HeartSaVioR

[HeartSaVioR]

LGTM. Thanks for fixing my missed spots.

[SparkQA]

Test build #4642 has finished for PR 24156 at commit 616c8ce.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[vanzin]

Merging to master.