Github user taoli91 commented on a diff in the pull request:
https://github.com/apache/spark/pull/12693#discussion_r61987150
--- Diff:
core/src/test/scala/org/apache/spark/scheduler/EventLoggingListenerSuite.scala
---
@@ -202,33 +202,37 @@ class EventLoggingListenerSuite extends SparkFunSuite
with LocalSparkContext wit
// Make sure expected events exist in the log file.
val logData = EventLoggingListener.openEventLog(new
Path(eventLogger.logPath), fileSystem)
- val logStart = SparkListenerLogStart(SPARK_VERSION)
- val lines = readLines(logData)
- val eventSet = mutable.Set(
- SparkListenerApplicationStart,
- SparkListenerBlockManagerAdded,
- SparkListenerExecutorAdded,
- SparkListenerEnvironmentUpdate,
- SparkListenerJobStart,
- SparkListenerJobEnd,
- SparkListenerStageSubmitted,
- SparkListenerStageCompleted,
- SparkListenerTaskStart,
- SparkListenerTaskEnd,
- SparkListenerApplicationEnd).map(Utils.getFormattedClassName)
- lines.foreach { line =>
- eventSet.foreach { event =>
- if (line.contains(event)) {
- val parsedEvent = JsonProtocol.sparkEventFromJson(parse(line))
- val eventType = Utils.getFormattedClassName(parsedEvent)
- if (eventType == event) {
- eventSet.remove(event)
+ try {
+ val logStart = SparkListenerLogStart(SPARK_VERSION)
+ val lines = readLines(logData)
--- End diff --
I tried:
```scala
val logData = EventLoggingListener.openEventLog(new
Path(eventLogger.logPath), fileSystem)
var lines : Seq[String] = null
try {
lines = readLines(logData)
} finally {
logData.close()
}
```
It thrown IOException complaining that Stream closed.
I think the readLines is sort of lazy such that it won't read the file
until we actually move the iterator.
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