spark常见问题处理
1、spark thriftserver报以下错误，其他诸如hive/sparksql等方式均正常
ERROR ActorSystemImpl: Uncaught fatal error from thread [sparkDriverActorSystem-akka.actor.default-dispatcher-379] shutting down ActorSystem [sparkDriverActorSystem]
java.lang.OutOfMemoryError: Java heap space
原因：thriftserver的堆内存不足
解决办法： 重启thriftserver，并调大executor-memory内存（不能超过spark总剩余内存，如超过，可调大spark-env.sh中的SPARK_WORKER_MEMORY参数，并重启spark集群。
start-thriftserver.sh --master spark://masterip:7077 --executor-memory 2g --total-executor-cores 4 --executor-cores 1 --hiveconf hive.server2.thrift.port=10050 --conf spark.dynamicAllocation.enabled=false
如果调大了executor的内存,依旧报此错误,仔细分析发现应该不是executor内存不足,而是driver内存不足,在standalone模式下默认给driver 1G内存,当我们提交应用启动driver时,如果读取数据太大,driver就可能报内存不足。
在spark-defaults.conf中调大driver参数
spark.driver.memory 2g
同时在spark-env.sh中同样设置
export SPARK_DRIVER_MEMORY=2g
2、Caused by: java.lang.OutOfMemoryError: GC overhead limit exceeded
JDK6新增错误类型。当GC为释放很小空间占用大量时间时抛出。
在JVM中增加该选项 -XX:-UseGCOverheadLimit 关闭限制GC的运行时间（默认启用 ）
在spark-defaults.conf中增加以下参数
spark.executor.extraJavaOptions -XX:-UseGCOverheadLimit
spark.driver.extraJavaOptions -XX:-UseGCOverheadLimit
3、spark 错误描述：
org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ipc.StandbyException): Operation category READ is not supported in state standby
原因：
NN主从切换时,spark报上述错误,经分析spark-defaults.conf配置参数spark.eventLog.dir写死了其中一个NN的IP,导致主从切换时，无法读日志。
另外，跟应用程序使用的checkpoint也有关系,首次启动应用程序时,创建了一个新的sparkcontext,而该sparkcontext绑定了具体的NN ip,
往后每次程序重启,由于应用代码【StreamingContext.getOrCreate(checkpointDirectory, functionToCreateContext _)】将从已有checkpoint目录导入checkpoint 数据来重新创建 StreamingContext 实例。
如果 checkpointDirectory 存在，那么 context 将导入 checkpoint 数据。如果目录不存在，函数 functionToCreateContext 将被调用并创建新的 context。
故出现上述异常。
解决：
针对测试系统：
1、将某个NN固定IP改成nameservice对应的值
2、清空应用程序的checkpoint日志
3、重启应用后,切换NN,spark应用正常
4、获取每次内存GC信息
spark-defaults.conf中增加：
spark.executor.extraJavaOptions -XX:+PrintGC -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps -XX:+PrintGCApplicationStoppedTime -XX:+PrintHeapAtGC -XX:+PrintGCApplicationConcurrentTime -Xloggc:gc.log
5、timeout,报错：
17/10/18 17:33:46 WARN TaskSetManager: Lost task 1393.0 in stage 382.0 (TID 223626, test-ssps-s-04): ExecutorLostFailure (executor 0 exited caused by one of the running tasks)
Reason:Executor heartbeat timed out after 173568 ms
17/10/18 17:34:02 WARN NettyRpcEndpointRef: Error sending message [message = KillExecutors(app-20171017115441-0012,List(8))] in 2 attempts
org.apache.spark.rpc.RpcTimeoutException: Futures timed out after [120 seconds]. This timeout is controlled by spark.rpc.askTimeout
at org.apache.spark.rpc.RpcTimeout.org$apache$spark$rpc$RpcTimeout$$createRpcTimeoutException(RpcTimeout.scala:48)
网络或者gc引起,worker或executor没有接收到executor或task的心跳反馈。
提高 spark.network.timeout 的值，根据情况改成300(5min)或更高。
默认为 120(120s),配置所有网络传输的延时
spark.network.timeout 300000
6、通过sparkthriftserver读取lzo文件报错：
ClassNotFoundException: Class com.hadoop.compression.lzo.LzoCodec not found
在spark-env.sh中增加如下配置：
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/hadoop/hadoop-2.2.0/lib/native
export SPARK_LIBRARY_PATH=$SPARK_LIBRARY_PATH:/home/hadoop/hadoop-2.2.0/lib/native
export SPARK_CLASSPATH=$SPARK_CLASSPATH:/home/hadoop/hadoop-2.2.0/share/hadoop/yarn/*:/home/hadoop/hadoop-2.2.0/share/hadoop/yarn/lib/*:/home/hadoop/hadoop-2.2.0/share/hadoop/common/*:/home/hadoop/hadoop-2.2.0/share/hadoop/common/lib/*:/home/hadoop/hadoop-2.2.0/share/hadoop/hdfs/*:/home/hadoop/hadoop-2.2.0/share/hadoop/hdfs/lib/*:/home/hadoop/hadoop-2.2.0/share/hadoop/mapreduce/*:/home/hadoop/hadoop-2.2.0/share/hadoop/mapreduce/lib/*:/home/hadoop/hadoop-2.2.0/share/hadoop/tools/lib/*:/home/hadoop/spark-1.6.1-bin-2.2.0/lib/*
并分发到各节点
重启spark thrift server执行正常
7、spark worker中发布executor频繁报错,陷入死循环（新建->失败->新建->失败.....）
work日志：
Asked to launch executor app-20171024225907-0018/77347 for org.apache.spark.sql.hive.thriftserver.HiveThriftServer2
worker.ExecutorRunner (Logging.scala:logInfo(58)) - Launch command: "/home/hadoop/jdk1.7.0_09/bin/java" ......
Executor app-20171024225907-0018/77345 finished with state EXITED message Command exited with code 53 exitStatus 53
executor日志：
ERROR [main] storage.DiskBlockManager (Logging.scala:logError(95)) - Failed to create local dir in . Ignoring this directory.
java.io.IOException: Failed to create a temp directory (under ) after 10 attempts!
再看配置文件spark-env.sh：
export SPARK_LOCAL_DIRS=/data/spark/data
设置了spark本地目录，但机器上并没有创建该目录，所以引发错误。
./drun "mkdir -p /data/spark/data"
./drun "chown -R hadoop:hadoop /data/spark"
创建后，重启worker未再出现错误。
8、spark worker异常退出：
worker中日志：
17/10/25 11:59:58 INFO worker.Worker: Master with url spark://10.10.10.82:7077 requested this worker to reconnect.
17/10/25 11:59:58 INFO worker.Worker: Not spawning another attempt to register with the master, since there is an attempt scheduled already.
17/10/25 11:59:59 INFO worker.Worker: Successfully registered with master spark://10.10.10.82:7077
17/10/25 11:59:59 INFO worker.Worker: Worker cleanup enabled; old application directories will be deleted in: /home/hadoop/spark-1.6.1-bin-2.2.0/work
17/10/25 12:00:00 INFO worker.Worker: Retrying connection to master (attempt # 1)
17/10/25 12:00:00 INFO worker.Worker: Master with url spark://10.10.10.82:7077 requested this worker to reconnect.
17/10/25 12:00:00 INFO worker.Worker: Master with url spark://10.10.10.82:7077 requested this worker to reconnect.
17/10/25 12:00:00 INFO worker.Worker: Not spawning another attempt to register with the master, since there is an attempt scheduled already.
17/10/25 12:00:00 INFO worker.Worker: Asked to launch executor app-20171024225907-0018/119773 for org.apache.spark.sql.hive.thriftserver.HiveThriftServer2
17/10/25 12:00:00 INFO worker.Worker: Connecting to master 10.10.10.82:7077...
17/10/25 12:00:00 INFO spark.SecurityManager: Changing view acls to: hadoop
17/10/25 12:00:00 INFO worker.Worker: Connecting to master 10.10.10.82:7077...
17/10/25 12:00:00 INFO spark.SecurityManager: Changing modify acls to: hadoop
17/10/25 12:00:00 INFO spark.SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users with view permissions: Set(hadoop); users with modify permissions: Set(hadoop)
17/10/25 12:00:01 ERROR worker.Worker: Worker registration failed: Duplicate worker ID
17/10/25 12:00:01 INFO worker.ExecutorRunner: Launch command: "/home/hadoop/jdk1.7.0_09/bin/java" "-cp" "/home/hadoop/spark-1.6.1-bin-2.2.0/lib/*:/home/hadoop/hadoop-2.2.0/share/hadoop/yarn/*:/home/hadoop/hadoop-2.2.0/share/hadoop/yarn/lib/*:/home/hadoop/hadoop-2.2.0/share/hadoop/common/*:/home/hadoop/hadoop-2.2.0/share/hadoop/common/lib/*:/home/hadoop/hadoop-2.2.0/share/hadoop/hdfs/*:/home/hadoop/hadoop-2.2.0/share/hadoop/hdfs/lib/*:/home/hadoop/hadoop-2.2.0/share/hadoop/mapreduce/*:/home/hadoop/hadoop-2.2.0/share/hadoop/mapreduce/lib/*:/home/hadoop/hadoop-2.2.0/share/hadoop/tools/lib/*:/home/hadoop/spark-1.6.1-bin-2.2.0/lib/*:/home/hadoop/spark-1.6.1-bin-2.2.0/conf/:/home/hadoop/spark-1.6.1-bin-2.2.0/lib/spark-assembly-1.6.1-hadoop2.2.0.jar:/home/hadoop/spark-1.6.1-bin-2.2.0/lib/datanucleus-api-jdo-3.2.6.jar:/home/hadoop/spark-1.6.1-bin-2.2.0/lib/datanucleus-rdbms-3.2.9.jar:/home/hadoop/spark-1.6.1-bin-2.2.0/lib/datanucleus-core-3.2.10.jar:/home/hadoop/hadoop-2.2.0/etc/hadoop/" "-Xms1024M" "-Xmx1024M" "-Dspark.driver.port=43546" "-XX:MaxPermSize=256m" "org.apache.spark.executor.CoarseGrainedExecutorBackend" "--driver-url" "spark://CoarseGrainedScheduler@10.10.10.80:43546" "--executor-id" "119773" "--hostname" "10.10.10.190" "--cores" "1" "--app-id" "app-20171024225907-0018" "--worker-url" "spark://Worker@10.10.10.190:55335"
17/10/25 12:00:02 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:02 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:02 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:03 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:04 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:04 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:04 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:04 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:04 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:04 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:04 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:04 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:04 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:04 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:04 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:04 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:05 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:05 INFO worker.ExecutorRunner: Killing process!
17/10/25 12:00:05 INFO util.ShutdownHookManager: Shutdown hook called
17/10/25 12:00:06 INFO util.ShutdownHookManager: Deleting directory /data/spark/data/spark-ab442bb5-62e6-4567-bc7c-8d00534ba1a3
近期，频繁出现worker异常退出情况，从worker日志看到，master要求重新连接并注册，注册后，worker继续连接master,并反馈了一个错误信息：
ERROR worker.Worker: Worker registration failed: Duplicate worker ID
之后就突然杀掉所有Executor然后退出worker。
出现该问题的机器内存都是16g(其他32g节点,没有出现worker退出问题)。
再查看该类节点yarn的 配置，发现分配yarn的资源是15g,怀疑问题节点yarn和spark同处高峰期，导致spark分配不到资源退出。
为验证猜想，查看NM日志，其时间发生点部分容器有自杀情况，但这个不能说明什么，因为其他时间点也存有该问题。
为查看问题时间点，节点中yarn资源使用情况，只能到active rm中查看rm日志，最后看到节点中在11:46:22到11:59:18，
问题节点yarn占用资源一直在。
如此，确实是该问题所致，将yarn资源调整至12g/10c,后续再继续观察。
8、spark （4个dd，11个nm）没有利用非datanode节点上的executor问题
问题描述：跑大job时，总任务数上万个，但是只利用了其中4个dd上的executor，另外7台没有跑或者跑很少。
分析：spark driver进行任务分配时,会希望每个任务正好分配到要计算的数据节点上，避免网络传输。但当task因为其所在数据节点资源正好被分配完而没机会再分配时，spark会等一段时间（由spark.locality.wait参数控制，默认3s）,超过该时间，就会选择一个本地化差的级别进行计算。
解决办法： 将spark.locality.wait设置为0，不等待，任务直接分配，需重启服务生效
9、spark自带参数不生效问题
spark thrift测试系统经常出问题，调整了driver内存参数，依旧报问题。
常见问题状态：连接spark thrift无响应，一会提示OutOfMemoryError: Java heap space
后来发现设置的driver内存参数没有生效，环境配置文件spark-env.sh设置了SPARK_DAEMON_MEMORY=1024m，覆盖了启动参数设置的
--driver-memory 4G
,导致参数设置没生效。
