Repository: flink Updated Branches: refs/heads/master 8b3cbb525 -> de45c06f1
[docs] Adds akka configuration description This closes #527. Project: http://git-wip-us.apache.org/repos/asf/flink/repo Commit: http://git-wip-us.apache.org/repos/asf/flink/commit/de45c06f Tree: http://git-wip-us.apache.org/repos/asf/flink/tree/de45c06f Diff: http://git-wip-us.apache.org/repos/asf/flink/diff/de45c06f Branch: refs/heads/master Commit: de45c06f11198a08d513f54e8c5646191213bd21 Parents: 8b3cbb5 Author: Till Rohrmann <trohrm...@apache.org> Authored: Thu Feb 19 18:01:42 2015 +0100 Committer: Till Rohrmann <trohrm...@apache.org> Committed: Tue Mar 24 15:20:16 2015 +0100 ---------------------------------------------------------------------- docs/config.md | 27 ++++++++++---------- .../flink/configuration/ConfigConstants.java | 3 +++ .../apache/flink/runtime/akka/AkkaUtils.scala | 7 ++--- 3 files changed, 18 insertions(+), 19 deletions(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/flink/blob/de45c06f/docs/config.md ---------------------------------------------------------------------- diff --git a/docs/config.md b/docs/config.md index 3524a60..251ce03 100644 --- a/docs/config.md +++ b/docs/config.md @@ -234,20 +234,19 @@ TaskManager hearbeat may be missing before the TaskManager is considered failed. ### Distributed Coordination (via Akka) -- `akka.startup-timeout`: -- `akka.transport.heartbeat.interval`: -- `akka.transport.heartbeat.pause`: -- `akka.transport.threshold`: -- `akka.watch.heartbeat.interval`: -- `akka.watch.heartbeat.pause`: -- `akka.watch.threshold`: -- `akka.tcp.timeout`: -- `akka.framesize`: -- `akka.throughput`: -- `akka.log.lifecycle.events`: -- `akka.loglevel`: -- `akka.ask.timeout`: - +- `akka.ask.timeout`: Timeout used for all futures and blocking Akka calls. If Flink fails due to timeouts then you should try to increase this value. Timeouts can be caused by slow machines or a congested network. The timeout value requires a time-unit specifier (ms/s/min/h/d) (DEFAULT: **100 s**). +- `akka.lookup.timeout`: Timeout used for the lookup of the JobManager. The timeout value has to contain a time-unit specifier (ms/s/min/h/d) (DEFAULT: **10 s**). +- `akka.framesize`: Maximum size of messages which are sent between the JobManager and the TaskManagers. If Flink fails because messages exceed this limit, then you should increase it. The message size requires a size-unit specifier (DEFAULT: **10485760b**). +- `akka.watch.heartbeat.interval`: Heartbeat interval for Akka's DeathWatch mechanism to detect dead TaskManagers. If TaskManagers are wrongly marked dead because of lost or delayed heartbeat messages, then you should increase this value. A thorough description of Akka's DeathWatch can be found [here](http://doc.akka.io/docs/akka/snapshot/scala/remoting.html#failure-detector) (DEFAULT: **akka.ask.timeout/10**). +- `akka.watch.heartbeat.pause`: Acceptable heartbeat pause for Akka's DeathWatch mechanism. A low value does not allow a irregular heartbeat. A thorough description of Akka's DeathWatch can be found [here](http://doc.akka.io/docs/akka/snapshot/scala/remoting.html#failure-detector) (DEFAULT: **akka.ask.timeout**). +- `akka.watch.threshold`: Threshold for the DeathWatch failure detector. A low value is prone to false positives whereas a high value increases the time to detect a dead TaskManager. A thorough description of Akka's DeathWatch can be found [here](http://doc.akka.io/docs/akka/snapshot/scala/remoting.html#failure-detector) (DEFAULT: **12**). +- `akka.transport.heartbeat.interval`: Heartbeat interval for Akka's transport failure detector. Since Flink uses TCP, the detector is not necessary. Therefore, the detector is disabled by setting the interval to a very high value. In case you should need the transport failure detector, set the interval to some reasonable value. The interval value requires a time-unit specifier (ms/s/min/h/d) (DEFAULT: **1000 s**). +- `akka.transport.heartbeat.pause`: Acceptable heartbeat pause for Akka's transport failure detector. Since Flink uses TCP, the detector is not necessary. Therefore, the detector is disabled by setting the pause to a very high value. In case you should need the transport failure detector, set the pause to some reasonable value. The pause value requires a time-unit specifier (ms/s/min/h/d) (DEFAULT: **6000 s**). +- `akka.transport.threshold`: Threshold for the transport failure detector. Since Flink uses TCP, the detector is not necessary and, thus, the threshold is set to a high value (DEFAULT: **300**). +- `akka.tcp.timeout`: Timeout for all outbound connections. If you should experience problems with connecting to a TaskManager due to a slow network, you should increase this value (DEFAULT: **akka.ask.timeout**). +- `akka.throughput`: Number of messages that are processed in a batch before returning the thread to the pool. Low values denote a fair scheduling whereas high values can increase the performance at the cost of unfairness (DEFAULT: **15**). +- `akka.log.lifecycle.events`: Turns on the Akka's remote logging of events. Set this value to 'on' in case of debugging (DEFAULT: **off**). +- `akka.startup-timeout`: Timeout after which the startup of a remote component is considered being failed (DEFAULT: **akka.ask.timeout**). ### JobManager Web Frontend http://git-wip-us.apache.org/repos/asf/flink/blob/de45c06f/flink-core/src/main/java/org/apache/flink/configuration/ConfigConstants.java ---------------------------------------------------------------------- diff --git a/flink-core/src/main/java/org/apache/flink/configuration/ConfigConstants.java b/flink-core/src/main/java/org/apache/flink/configuration/ConfigConstants.java index 09f55fd..44f146d 100644 --- a/flink-core/src/main/java/org/apache/flink/configuration/ConfigConstants.java +++ b/flink-core/src/main/java/org/apache/flink/configuration/ConfigConstants.java @@ -328,6 +328,9 @@ public final class ConfigConstants { // ------------------------------ AKKA ------------------------------------ + /** + * Timeout for the startup of the actor system + */ public static final String AKKA_STARTUP_TIMEOUT = "akka.startup-timeout"; /** http://git-wip-us.apache.org/repos/asf/flink/blob/de45c06f/flink-runtime/src/main/scala/org/apache/flink/runtime/akka/AkkaUtils.scala ---------------------------------------------------------------------- diff --git a/flink-runtime/src/main/scala/org/apache/flink/runtime/akka/AkkaUtils.scala b/flink-runtime/src/main/scala/org/apache/flink/runtime/akka/AkkaUtils.scala index be55e14..423cdfd 100644 --- a/flink-runtime/src/main/scala/org/apache/flink/runtime/akka/AkkaUtils.scala +++ b/flink-runtime/src/main/scala/org/apache/flink/runtime/akka/AkkaUtils.scala @@ -18,18 +18,15 @@ package org.apache.flink.runtime.akka -import java.io.IOException import java.net.InetAddress import java.util.concurrent.{TimeUnit, Callable} -import akka.actor.Actor.Receive import akka.actor._ -import akka.pattern.{Patterns, ask => akkaAsk} -import akka.remote.{RemotingLifecycleEvent, AssociationEvent} +import akka.pattern.{ask => akkaAsk} import com.typesafe.config.{Config, ConfigFactory} import org.apache.flink.configuration.{ConfigConstants, Configuration} import org.slf4j.LoggerFactory -import scala.concurrent.{ExecutionContext, Future, Await} +import scala.concurrent.{ExecutionContext, Future} import scala.concurrent.duration._ import scala.language.postfixOps
