[SPARK-20853] spark.ui.reverseProxy=true leads to hanging communication to master

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 2.1.0
• Component/s: Web UI
• Labels: network web-ui

Environment

ppc64le GNU/Linux, POWER8, only master node is reachable externally other nodes are in an internal network

• Assignee: Unassigned
• Reporter: Benno Staebler
• Created: 23/May/17 09:51
• Updated: 04/Aug/17 14:28
• Resolved: 24/May/17 07:40

Description

When reverse proxy is enabled

spark.ui.reverseProxy=true
spark.ui.reverseProxyUrl=/

first of all any invocation of the spark master Web UI hangs forever locally (e.g. http://192.168.10.16:25001) and via external URL without any data received.
One, sometimes two spark applications succeed without error and than workers start throwing exceptions:

Caused by: java.io.IOException: Failed to connect to /192.168.10.16:25050

The application dies during creation of SparkContext:

2017-05-22 16:11:23 INFO StandaloneAppClient$ClientEndpoint:54 - Connecting to master spark://node0101:25000...
2017-05-22 16:11:23 INFO TransportClientFactory:254 - Successfully created connection to node0101/192.168.10.16:25000 after 169 ms (132 ms spent in bootstraps)
2017-05-22 16:11:43 INFO StandaloneAppClient$ClientEndpoint:54 - Connecting to master spark://node0101:25000...
2017-05-22 16:12:03 INFO StandaloneAppClient$ClientEndpoint:54 - Connecting to master spark://node0101:25000...
2017-05-22 16:12:23 ERROR StandaloneSchedulerBackend:70 - Application has been killed. Reason: All masters are unresponsive! Giving up.
2017-05-22 16:12:23 WARN StandaloneSchedulerBackend:66 - Application ID is not initialized yet.
2017-05-22 16:12:23 INFO Utils:54 - Successfully started service 'org.apache.spark.network.netty.NettyBlockTransferService' on port 25056.
.....
Caused by: java.lang.IllegalArgumentException: requirement failed: Can only call getServletHandlers on a running MetricsSystem

This definitively does not happen without reverse proxy enabled!

Issue Links

• is cloned by: SPARK-21176 Master UI hangs with spark.ui.reverseProxy=true if the master node has many CPUs