Hello, We are building a Spark Streaming application that listens to a directory on HDFS, and uses the SolrJ library to send newly detected files to a Solr server. When we put 10.000 files to the directory it is listening to, it starts to process them by sending the files to our Solr server but after about a few thousand files the Spark Streaming application dies.
Before the application dies, It gives some TimeoutException errors related to Akka, such as: util.AkkaUtils: Error sending message in 1 attempts java.util.concurrent.TimeoutException: Futures timed out after [30 seconds] akka.pattern.AskTimeoutException: Timed out Any ideas on how to deal with this? Should we add/change/tweak some Spark configuration parameters? We're using Spark 1.2.0 on a YARN cluster, and we're giving 4 cores and 2GB of memory to that application when invoking it via spark-submit command. Below you can read the last few lines of the log file, showing what our Spark Streaming application logged just before it died: 15/02/20 13:28:25 INFO rdd.NewHadoopRDD: Input split: hdfs://node01.demo.hadoop:8020/user/bjorn/spark-belga/dbpedia-translator-out/2fdf95f1-67d6-40b7-9345-fe129e38a2d9.json:0+2620 15/02/20 13:28:25 INFO broadcast.TorrentBroadcast: Started reading broadcast variable 3004 15/02/20 13:28:32 INFO storage.MemoryStore: ensureFreeSpace(20996) called with curMem=31171148, maxMem=1111794647 15/02/20 13:28:32 INFO storage.MemoryStore: Block broadcast_3004_piece0 stored as bytes in memory (estimated size 20.5 KB, free 1030.5 MB) 15/02/20 13:28:33 INFO storage.BlockManagerMaster: Updated info of block broadcast_3004_piece0 15/02/20 13:28:33 INFO broadcast.TorrentBroadcast: Reading broadcast variable 3004 took 7897 ms 15/02/20 13:28:33 INFO storage.MemoryStore: ensureFreeSpace(347363) called with curMem=31192144, maxMem=1111794647 15/02/20 13:28:33 INFO storage.MemoryStore: Block broadcast_3004 stored as values in memory (estimated size 339.2 KB, free 1030.2 MB) 15/02/20 13:28:33 INFO storage.MemoryStore: ensureFreeSpace(2627) called with curMem=31539507, maxMem=1111794647 15/02/20 13:28:33 INFO storage.MemoryStore: Block rdd_3659_3 stored as bytes in memory (estimated size 2.6 KB, free 1030.2 MB) 15/02/20 13:28:34 INFO storage.BlockManagerMaster: Updated info of block rdd_3659_3 15/02/20 13:28:34 INFO impl.HttpClientUtil: Creating new http client, config:maxConnections=128&maxConnectionsPerHost=32&followRedirects=false 15/02/20 13:28:36 INFO storage.MemoryStore: ensureFreeSpace(5) called with curMem=31542134, maxMem=1111794647 15/02/20 13:28:36 INFO storage.MemoryStore: Block rdd_3660_3 stored as bytes in memory (estimated size 5.0 B, free 1030.2 MB) 15/02/20 13:28:40 INFO storage.BlockManagerMaster: Updated info of block rdd_3660_3 15/02/20 13:28:40 INFO executor.Executor: Finished task 3.0 in stage 245.0 (TID 3455). 2516 bytes result sent to driver 15/02/20 13:29:07 WARN util.AkkaUtils: Error sending message in 1 attempts java.util.concurrent.TimeoutException: Futures timed out after [30 seconds] at scala.concurrent.impl.Promise$DefaultPromise.ready(Promise.scala:219) at scala.concurrent.impl.Promise$DefaultPromise.result(Promise.scala:223) at scala.concurrent.Await$$anonfun$result$1.apply(package.scala:107) at scala.concurrent.BlockContext$DefaultBlockContext$.blockOn(BlockContext.scala:53) at scala.concurrent.Await$.result(package.scala:107) at org.apache.spark.util.AkkaUtils$.askWithReply(AkkaUtils.scala:187) at org.apache.spark.executor.Executor$$anon$1.run(Executor.scala:398) 15/02/20 13:29:08 ERROR executor.CoarseGrainedExecutorBackend: Driver Disassociated [akka.tcp://sparkexecu...@node08.demo.hadoop:48042] -> [akka.tcp://sparkdri...@node07.demo.hadoop:56535] disassociated! Shutting down. LogType: stdout LogLength: 0 Log Contents: Container: container_1422006251277_0837_01_000004 on node08.demo.hadoop_8041 ============================================================================== LogType: stderr LogLength: 2952 Log Contents: SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/mnt/disk1/cm/parcels/CDH-5.3.0-1.cdh5.3.0.p0.30/jars/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/mnt/disk3/yarn/nm/usercache/bjorn/filecache/354/bigcontent-1.0-SNAPSHOT.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory] 15/02/20 13:29:26 INFO executor.CoarseGrainedExecutorBackend: Registered signal handlers for [TERM, HUP, INT] 15/02/20 13:29:27 INFO spark.SecurityManager: Changing view acls to: yarn,bjorn 15/02/20 13:29:27 INFO spark.SecurityManager: Changing modify acls to: yarn,bjorn 15/02/20 13:29:27 INFO spark.SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users with view permissions: Set(yarn, bjorn); users with modify permissions: Set(yarn, bjorn) 15/02/20 13:29:28 INFO slf4j.Slf4jLogger: Slf4jLogger started 15/02/20 13:29:28 INFO Remoting: Starting remoting 15/02/20 13:29:29 INFO Remoting: Remoting started; listening on addresses :[akka.tcp://driverpropsfetc...@node08.demo.hadoop:60995] 15/02/20 13:29:29 INFO Remoting: Remoting now listens on addresses: [akka.tcp://driverpropsfetc...@node08.demo.hadoop:60995] 15/02/20 13:29:29 INFO util.Utils: Successfully started service 'driverPropsFetcher' on port 60995. 15/02/20 13:29:59 WARN security.UserGroupInformation: PriviledgedActionException as:bjorn (auth:SIMPLE) cause:akka.pattern.AskTimeoutException: Timed out Exception in thread "main" java.lang.reflect.UndeclaredThrowableException at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1655) at org.apache.spark.deploy.SparkHadoopUtil.runAsSparkUser(SparkHadoopUtil.scala:59) at org.apache.spark.executor.CoarseGrainedExecutorBackend$.run(CoarseGrainedExecutorBackend.scala:115) at org.apache.spark.executor.CoarseGrainedExecutorBackend$.main(CoarseGrainedExecutorBackend.scala:161) at org.apache.spark.executor.CoarseGrainedExecutorBackend.main(CoarseGrainedExecutorBackend.scala) Caused by: akka.pattern.AskTimeoutException: Timed out at akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:334) at akka.actor.Scheduler$$anon$11.run(Scheduler.scala:118) at scala.concurrent.Future$InternalCallbackExecutor$.scala$concurrent$Future$InternalCallbackExecutor$$unbatchedExecute(Future.scala:694) at scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:691) at akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(Scheduler.scala:455) at akka.actor.LightArrayRevolverScheduler$$anon$12.executeBucket$1(Scheduler.scala:407) at akka.actor.LightArrayRevolverScheduler$$anon$12.nextTick(Scheduler.scala:411) at akka.actor.LightArrayRevolverScheduler$$anon$12.run(Scheduler.scala:363) at java.lang.Thread.run(Thread.java:745) Kind regards, Emre Sevinç http://www.bigindustries.be/