pan3793 commented on code in PR #41709:
URL: https://github.com/apache/spark/pull/41709#discussion_r1239566530
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core/src/main/scala/org/apache/spark/util/Utils.scala:
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@@ -2287,6 +2287,22 @@ private[spark] object Utils extends Logging with
SparkClassUtils {
}.map(threadInfoToThreadStackTrace)
}
+ /** Return a heap dump. Used to capture dumps for the web UI */
+ def getHeapHistogram(): Array[String] = {
+ val pid = String.valueOf(ProcessHandle.current().pid())
+ val builder = new ProcessBuilder("jmap", "-histo:live", pid)
Review Comment:
I suppose the `$JAVA_HOME/bin/jmap`(in above case, should be
`/opt/openjdk-11/bin/jmap` instead of `/opt/openjdk-8/bin/jmap`) should be
used, instead of the one first present in `PATH`.
And if only `JAVA_HOME` is set, but no `jmap` in `PATH`, the invocation will
fail.
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