Github user lins05 commented on a diff in the pull request:
https://github.com/apache/spark/pull/15377#discussion_r82224216
--- Diff: core/src/main/scala/org/apache/spark/util/Utils.scala ---
@@ -2474,25 +2474,36 @@ private[spark] class CallerContext(
val context = "SPARK_" + from + appIdStr + appAttemptIdStr +
jobIdStr + stageIdStr + stageAttemptIdStr + taskIdStr +
taskAttemptNumberStr
+ private var callerContextSupported: Boolean = true
+
/**
* Set up the caller context [[context]] by invoking Hadoop
CallerContext API of
* [[org.apache.hadoop.ipc.CallerContext]], which was added in hadoop
2.8.
*/
def setCurrentContext(): Boolean = {
- var succeed = false
- try {
- // scalastyle:off classforname
- val callerContext =
Class.forName("org.apache.hadoop.ipc.CallerContext")
- val Builder =
Class.forName("org.apache.hadoop.ipc.CallerContext$Builder")
- // scalastyle:on classforname
- val builderInst =
Builder.getConstructor(classOf[String]).newInstance(context)
- val hdfsContext = Builder.getMethod("build").invoke(builderInst)
- callerContext.getMethod("setCurrent", callerContext).invoke(null,
hdfsContext)
- succeed = true
- } catch {
- case NonFatal(e) => logInfo("Fail to set Spark caller context", e)
+ if (!callerContextSupported) {
+ false
+ } else {
+ try {
+ // scalastyle:off classforname
+ val callerContext =
Class.forName("org.apache.hadoop.ipc.CallerContext")
+ val builder =
Class.forName("org.apache.hadoop.ipc.CallerContext$Builder")
+ // scalastyle:on classforname
+ val builderInst =
builder.getConstructor(classOf[String]).newInstance(context)
+ val hdfsContext = builder.getMethod("build").invoke(builderInst)
+ callerContext.getMethod("setCurrent", callerContext).invoke(null,
hdfsContext)
+ true
+ } catch {
+ case e: ClassNotFoundException =>
+ logInfo(
+ s"Fail to set Spark caller context: requires Hadoop 2.8 or
later: ${e.getMessage}")
+ callerContextSupported = false
+ false
+ case NonFatal(e) =>
+ logWarning("Fail to set Spark caller context", e)
--- End diff --
Emm, I prefer not to suppress the non-ClassNotFound errors, because they
are real errors, compared to the ClassNotFound error, which is rather a
*conditional feature* based on the hadoop environment.
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