Hi,
I try my first steps with Spark but I have problems to access Spark running on my Linux server from my Mac. I start Spark with sbin/start-all.sh When I now open the website at port 8080 I see that all is running and I can access Spark at port 7077 but this doesn't work. I scanned the Linux machine with nmap and port 7077 isn't open. On my Mac side I get this error message: Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties 15/03/16 09:11:41 INFO SparkContext: Running Spark version 1.3.0 2015-03-16 09:11:41.782 java[1004:46676] Unable to load realm info from SCDynamicStore 15/03/16 09:11:41 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 15/03/16 09:11:42 INFO SecurityManager: Changing view acls to: dasralph 15/03/16 09:11:42 INFO SecurityManager: Changing modify acls to: dasralph 15/03/16 09:11:42 INFO SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users with view permissions: Set(dasralph); users with modify permissions: Set(dasralph) 15/03/16 09:11:43 INFO Slf4jLogger: Slf4jLogger started 15/03/16 09:11:43 INFO Remoting: Starting remoting 15/03/16 09:11:43 INFO Remoting: Remoting started; listening on addresses :[akka.tcp://sparkDriver@imac_wlan.lan:52886] 15/03/16 09:11:43 INFO Utils: Successfully started service 'sparkDriver' on port 52886. 15/03/16 09:11:43 INFO SparkEnv: Registering MapOutputTracker 15/03/16 09:11:43 INFO SparkEnv: Registering BlockManagerMaster 15/03/16 09:11:43 INFO DiskBlockManager: Created local directory at /var/folders/h3/r2qtlmbn1cd6ctj_rcyyq_240000gn/T/spark-9cce9d78-a0e6-4fb5-8cf6-00d91c764927/blockmgr-bd444818-a50a-4ea0-9cf6-3b2545f32238 15/03/16 09:11:43 INFO MemoryStore: MemoryStore started with capacity 1966.1 MB 15/03/16 09:11:43 INFO HttpFileServer: HTTP File server directory is /var/folders/h3/r2qtlmbn1cd6ctj_rcyyq_240000gn/T/spark-dd67dc02-c0b7-4167-b8d5-29f057cfb253/httpd-8534edfe-46b8-49ea-9273-3e8e47947332 15/03/16 09:11:43 INFO HttpServer: Starting HTTP Server 15/03/16 09:11:44 INFO Server: jetty-8.y.z-SNAPSHOT 15/03/16 09:11:44 INFO AbstractConnector: Started SocketConnector@0.0.0.0:52913 15/03/16 09:11:44 INFO Utils: Successfully started service 'HTTP file server' on port 52913. 15/03/16 09:11:44 INFO SparkEnv: Registering OutputCommitCoordinator 15/03/16 09:11:44 INFO Server: jetty-8.y.z-SNAPSHOT 15/03/16 09:11:44 INFO AbstractConnector: Started SelectChannelConnector@0.0.0.0:4040 15/03/16 09:11:44 INFO Utils: Successfully started service 'SparkUI' on port 4040. 15/03/16 09:11:44 INFO SparkUI: Started SparkUI at http://imac_wlan.lan:4040 15/03/16 09:11:44 INFO AppClient$ClientActor: Connecting to master akka.tcp://sparkMaster@debian:7077/user/Master... 15/03/16 09:11:45 WARN ReliableDeliverySupervisor: Association with remote system [akka.tcp://sparkMaster@debian:7077] has failed, address is now gated for [5000] ms. Reason is: [Disassociated]. 15/03/16 09:12:04 INFO AppClient$ClientActor: Connecting to master akka.tcp://sparkMaster@debian:7077/user/Master... 15/03/16 09:12:04 WARN ReliableDeliverySupervisor: Association with remote system [akka.tcp://sparkMaster@debian:7077] has failed, address is now gated for [5000] ms. Reason is: [Disassociated]. 15/03/16 09:12:24 INFO AppClient$ClientActor: Connecting to master akka.tcp://sparkMaster@debian:7077/user/Master... 15/03/16 09:12:24 WARN ReliableDeliverySupervisor: Association with remote system [akka.tcp://sparkMaster@debian:7077] has failed, address is now gated for [5000] ms. Reason is: [Disassociated]. 15/03/16 09:12:44 ERROR SparkDeploySchedulerBackend: Application has been killed. Reason: All masters are unresponsive! Giving up. 15/03/16 09:12:44 ERROR TaskSchedulerImpl: Exiting due to error from cluster scheduler: All masters are unresponsive! Giving up. 15/03/16 09:12:44 WARN SparkDeploySchedulerBackend: Application ID is not initialized yet. 15/03/16 09:12:45 INFO NettyBlockTransferService: Server created on 53666 15/03/16 09:12:45 INFO BlockManagerMaster: Trying to register BlockManager 15/03/16 09:12:45 INFO BlockManagerMasterActor: Registering block manager imac_wlan.lan:53666 with 1966.1 MB RAM, BlockManagerId(<driver>, imac_wlan.lan, 53666) 15/03/16 09:12:45 INFO BlockManagerMaster: Registered BlockManager 15/03/16 09:12:45 ERROR MetricsSystem: Sink class org.apache.spark.metrics.sink.MetricsServlet cannot be instantialized What's going wrong? 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