Spark cluster Master IP address not binding to floating IP

apache-spark network-programming ip-address openstack
Philip O'Brien picture Philip O'Brien · May 12, 2016 · Viewed 16.1k times · Source

I'm trying to configure a Spark cluster using OpenStack. Currently I have two servers named

  • spark-master (IP: 192.x.x.1, floating IP: 87.x.x.1)
  • spark-slave-1 (IP: 192.x.x.2, floating IP: 87.x.x.2)

I am running into problems when trying to use these floating IPs vs the standard public IPs.

On the spark-master machine, the hostname is spark-master and /etc/hosts looks like

127.0.0.1 localhost
127.0.1.1 spark-master

The only change made to spark-env.sh is export SPARK_MASTER_IP='192.x.x.1'. If I run ./sbin/start-master.sh I can view the web UI.

The thing is I view the web UI using the floating IP 87.x.x.1, and there it lists the Master URL: spark://192.x.x.1:7077.

From the slave I can run ./sbin/start-slave.sh spark://192.x.x.1:7077 and it connects successfully.

If I try to use the floating IP by changing spark-env.sh on the master to export SPARK_MASTER_IP='87.x.x.1' then I get the following error log

Spark Command: /usr/lib/jvm/java-7-openjdk-amd64/bin/java -cp /usr/local/spark-1.6.1-bin-hadoop2.6/conf/:/usr/local/spark-1.6.1-bin-hadoop2.6/lib/spark-assembly-1.6.1-hadoop2.6.0.jar:/usr/local/spark-1.6.1-bin-hadoop2.6/lib/datanucleus-core-3.2.10.jar:/usr/local/spark-1.6.1-bin-hadoop2.6/lib/datanucleus-api-jdo-3.2.6.jar:/usr/local/spark-1.6.1-bin-hadoop2.6/lib/datanucleus-rdbms-3.2.9.jar -Xms1g -Xmx1g -XX:MaxPermSize=256m org.apache.spark.deploy.master.Master --ip 87.x.x.1 --port 7077 --webui-port 8080
========================================
Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties
16/05/12 15:05:33 INFO Master: Registered signal handlers for [TERM, HUP, INT]
16/05/12 15:05:33 WARN Utils: Your hostname, spark-master resolves to a loopback address: 127.0.1.1; using 192.x.x.1 instead (on interface eth0)
16/05/12 15:05:33 WARN Utils: Set SPARK_LOCAL_IP if you need to bind to another address
16/05/12 15:05:33 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
16/05/12 15:05:33 INFO SecurityManager: Changing view acls to: ubuntu
16/05/12 15:05:33 INFO SecurityManager: Changing modify acls to: ubuntu
16/05/12 15:05:33 INFO SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users with view permissions: Set(ubuntu); users with modify permissions: Set(ubuntu)
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7077. Attempting port 7078.
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7078. Attempting port 7079.
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7079. Attempting port 7080.
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7080. Attempting port 7081.
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7081. Attempting port 7082.
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7082. Attempting port 7083.
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7083. Attempting port 7084.
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7084. Attempting port 7085.
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7085. Attempting port 7086.
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7086. Attempting port 7087.
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7087. Attempting port 7088.
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7088. Attempting port 7089.
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7089. Attempting port 7090.
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7090. Attempting port 7091.
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7091. Attempting port 7092.
16/05/12 15:05:33 WARN Utils: Service 'sparkMaster' could not bind on port 7092. Attempting port 7093.
Exception in thread "main" java.net.BindException: Cannot assign requested address: Service 'sparkMaster' failed after 16 retries!
  at sun.nio.ch.Net.bind0(Native Method)
  at sun.nio.ch.Net.bind(Net.java:463)
  at sun.nio.ch.Net.bind(Net.java:455)
  at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
  at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
  at io.netty.channel.socket.nio.NioServerSocketChannel.doBind(NioServerSocketChannel.java:125)
  at io.netty.channel.AbstractChannel$AbstractUnsafe.bind(AbstractChannel.java:485)
  at io.netty.channel.DefaultChannelPipeline$HeadContext.bind(DefaultChannelPipeline.java:1089)
  at io.netty.channel.AbstractChannelHandlerContext.invokeBind(AbstractChannelHandlerContext.java:430)
  at io.netty.channel.AbstractChannelHandlerContext.bind(AbstractChannelHandlerContext.java:415)
  at io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:903)
  at io.netty.channel.AbstractChannel.bind(AbstractChannel.java:198)
  at io.netty.bootstrap.AbstractBootstrap$2.run(AbstractBootstrap.java:348)
  at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:357)
  at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:357)
  at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
  at java.lang.Thread.run(Thread.java:745)

Obviously the takeaway here for me is the line

Your hostname, spark-master resolves to a loopback address: 127.0.1.1; using 192.x.x.1 instead (on interface eth0) 16/05/12 15:05:33 WARN Utils: Set SPARK_LOCAL_IP if you need to bind to another address

but no matter what approach I then try and take I just run into more errors.

If I set both export SPARK_MASTER_IP='87.x.x.1' and export SPARK_LOCAL_IP='87.x.x.1' and try ./sbin/start-master.sh I get the following error log

16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7077. Attempting port 7078.
16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7078. Attempting port 7079.
16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7079. Attempting port 7080.
16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7080. Attempting port 7081.
16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7081. Attempting port 7082.
16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7082. Attempting port 7083.
16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7083. Attempting port 7084.
16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7084. Attempting port 7085.
16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7085. Attempting port 7086.
16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7086. Attempting port 7087.
16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7087. Attempting port 7088.
16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7088. Attempting port 7089.
16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7089. Attempting port 7090.
16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7090. Attempting port 7091.
16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7091. Attempting port 7092.
16/05/17 11:00:55 WARN Utils: Service 'sparkMaster' could not bind on port 7092. Attempting port 7093.
Exception in thread "main" java.net.BindException: Cannot assign requested address: Service 'sparkMaster' failed after 16 retries!

This, despite the fact my security group seems correct

ALLOW IPv4 443/tcp from 0.0.0.0/0
ALLOW IPv4 80/tcp from 0.0.0.0/0
ALLOW IPv4 8081/tcp from 0.0.0.0/0
ALLOW IPv4 8080/tcp from 0.0.0.0/0
ALLOW IPv4 18080/tcp from 0.0.0.0/0
ALLOW IPv4 7077/tcp from 0.0.0.0/0
ALLOW IPv4 4040/tcp from 0.0.0.0/0
ALLOW IPv4 to 0.0.0.0/0
ALLOW IPv6 to ::/0
ALLOW IPv4 22/tcp from 0.0.0.0/0

Answer

Bruno B. Carvalho picture Bruno B. Carvalho · May 18, 2016

I've set a spark cluster (standalone cluster) on Openstack myself and in my /etc/hosts file on the master, I have:

127.0.0.1 localhost

192.168.1.2 spark-master instead of 127.0.0.1

Now, since I have a virtual private network for my master and my slaves, I only work with the private IPs. The only time I use the floating IP is on my host computer when I launch spark-submit --master spark://spark-master (spark-master here resolves to the floating IP). I don't think you need to try to bind the floating IP. I hope that helps!

Bruno

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