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https://issues.apache.org/jira/browse/SPARK-56845?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tongwei updated SPARK-56845:
----------------------------
Description:
Symptom ： When spark.app.name is very long (> ~222 chars), the derived
resourceNamePrefix plus a fixed suffix (-hadoop-config, -krb5-file,
-driver-podspec-conf-map) exceeds the Kubernetes DNS subdomain limit of
253 characters, and driver submission fails with "must be no more than
253 characters".
The existing KubernetesClientUtils.configMapName helper truncates
correctly but is hardcoded to the -conf-map suffix and unused by these
three call sites.
Fix：Add a configMapName(prefix, suffix) overload that falls back to
spark-<uniqueID><suffix> when prefix+suffix exceeds the limit, and
migrate the three sites to it.
was:
h3. Symptom
When \{{spark.app.name}} is very long (> ~222 chars), the derived
\{{resourceNamePrefix}} plus a fixed suffix (\{{-hadoop-config}},
\{{-krb5-file}}, \{{-driver-podspec-conf-map}}) exceeds the Kubernetes DNS
subdomain limit of 253 characters, and driver submission fails with
\{{must be no more than 253 characters}}.
The existing \{{KubernetesClientUtils.configMapName}} helper truncates
correctly but is hardcoded to the \{{-conf-map}} suffix and unused by these
three call sites.
h3. Fix
Add a \{{configMapName(prefix, suffix)}} overload that falls back to
\{{spark-<uniqueID><suffix>}} when \{{prefix+suffix}} exceeds the limit, and
migrate the three sites to it.
> Truncate ConfigMap names that exceed DNS subdomain limit
> --------------------------------------------------------
>
> Key: SPARK-56845
> URL: https://issues.apache.org/jira/browse/SPARK-56845
> Project: Spark
> Issue Type: Bug
> Components: Kubernetes
> Affects Versions: 4.1.1
> Reporter: Tongwei
> Priority: Major
>
> Symptom ： When spark.app.name is very long (> ~222 chars), the derived
> resourceNamePrefix plus a fixed suffix (-hadoop-config, -krb5-file,
> -driver-podspec-conf-map) exceeds the Kubernetes DNS subdomain limit of
> 253 characters, and driver submission fails with "must be no more than
> 253 characters".
> The existing KubernetesClientUtils.configMapName helper truncates
> correctly but is hardcoded to the -conf-map suffix and unused by these
> three call sites.
> Fix：Add a configMapName(prefix, suffix) overload that falls back to
> spark-<uniqueID><suffix> when prefix+suffix exceeds the limit, and
> migrate the three sites to it.
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