Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/15307#discussion_r82717123
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/StreamExecution.scala
---
@@ -105,11 +105,21 @@ class StreamExecution(
var lastExecution: QueryExecution = null
@volatile
- var streamDeathCause: StreamingQueryException = null
+ private var streamDeathCause: StreamingQueryException = null
/* Get the call site in the caller thread; will pass this into the micro
batch thread */
private val callSite = Utils.getCallSite()
+ /** Metrics for this query */
+ private val streamMetrics =
+ new StreamMetrics(uniqueSources.toSet, triggerClock,
s"StructuredStreaming.$name")
--- End diff --
Id can vary between query restarts. we want all the metrics across query
restarts to be posted to the same metric in sinks (say, Ganglia) so that we can
track the metrics of an application across restasrts.
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