Github user nirandaperera commented on the pull request:
https://github.com/apache/spark/pull/12506#issuecomment-212841502
@mridulm You are correct. But if we check the register application method,
` private def registerApplication(app: ApplicationInfo): Unit = {
val appAddress = app.driver.address
if (addressToApp.contains(appAddress)) {
logInfo("Attempted to re-register application at same address: " +
appAddress)
return
}
applicationMetricsSystem.registerSource(app.appSource)
apps += app
idToApp(app.id) = app
endpointToApp(app.driver) = app
addressToApp(appAddress) = app
waitingApps += app
}`
there are similar array buffers which are getting updated without being
synchronized. That is why I omitted making the waitingAppsWhileRecovering
synchronized.
am I doing anything wrong there?
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