kafka-web-console error

Hi, all

I am running kafka-web-console, I periodically getting such error and cause
the UI down:

! @6kldaf9lj - Internal server error, for (GET)
[/assets/images/zookeeper_small.gif] ->
play.api.Application$$anon$1: Execution exception[[FileNotFoundException:
/vagrant/kafka-web-console-master/target/scala-2.10/classes/public/images/zookeeper_small.gif
(Too many open files)]]
at play.api.Application$class.handleError(Application.scala:293)
~[play_2.10-2.2.1.jar:2.2.1]
at play.api.DefaultApplication.handleError(Application.scala:399)
[play_2.10-2.2.1.jar:2.2.1]
at
play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$12$$anonfun$apply$1.applyOrElse(PlayDefaultUpstreamHandler.scala:165)
[play_2.10-2.2.1.jar:2.2.1]
at
play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$12$$anonfun$apply$1.applyOrElse(PlayDefaultUpstreamHandler.scala:162)
[play_2.10-2.2.1.jar:2.2.1]
at
scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:33)
[scala-library-2.10.2.jar:na]
at scala.util.Failure$$anonfun$recover$1.apply(Try.scala:185)
[scala-library-2.10.2.jar:na]
Caused by: java.io.FileNotFoundException:
/vagrant/kafka-web-console-master/target/scala-2.10/classes/public/images/zookeeper_small.gif
(Too many open files)
at java.io.FileInputStream.open(Native Method) ~[na:1.7.0_65]
at java.io.FileInputStream.<init>(FileInputStream.java:146)
~[na:1.7.0_65]
at java.io.FileInputStream.<init>(FileInputStream.java:101)
~[na:1.7.0_65]
at
sun.net.www.protocol.file.FileURLConnection.connect(FileURLConnection.java:90)
~[na:1.7.0_65]
at
sun.net.www.protocol.file.FileURLConnection.getInputStream(FileURLConnection.java:188)
~[na:1.7.0_65]
at java.net.URL.openStream(URL.java:1037) ~[na:1.7.0_65]

[debug] application - Getting partition offsets for topic ui_test_topic_6
[warn] application - Could not connect to partition leader
exemplary-birds.master:9092. Error message: Failed to open a socket.
[debug] application - Getting partition offsets for topic ui_test_topic_5
[warn] application - Could not connect to partition leader
exemplary-birds.master:9092. Error message: Failed to open a socket.
[warn] application - Could not connect to partition leader
harmful-jar.master:9092. Error message: Failed to open a socket.
[warn] application - Could not connect to partition leader
voluminous-mass.master:9092. Error message: Failed to open a socket.
[warn] application - Could not connect to partition leader
voluminous-mass.master:9092. Error message: Failed to open a socket.
[warn] application - Could not connect to partition leader
exemplary-birds.master:9092. Error message: Failed to open a socket.
[warn] application - Could not connect to partition leader
exemplary-birds.master:9092. Error message: Failed to open a socket.
[warn] application - Could not connect to partition leader
harmful-jar.master:9092. Error message: Failed to open a socket.
[warn] application - Could not connect to partition leader
harmful-jar.master:9092. Error message: Failed to open a socket.
[warn] application - Could not connect to partition leader
voluminous-mass.master:9092. Error message: Failed to open a socket.
[warn] application - Could not connect to partition leader
voluminous-mass.master:9092. Error message: Failed to open a socket.
[warn] application - Could not connect to partition leader
exemplary-birds.master:9092. Error message: Failed to open a socket.
[warn] application - Could not connect to partition leader
harmful-jar.master:9092. Error message: Failed to open a socket.
[warn] application - Could not connect to partition leader
exemplary-birds.master:9092. Error message: Failed to open a socket.
[debug] application - Getting partition offsets for topic PofApiTest
[warn] application - Could not connect to partition leader
harmful-jar.master:9092. Error message: Failed to open a socket.
[warn] application - Could not connect to partition leader
voluminous-mass.master:9092. Error message: Failed to open a socket.
[warn] application - Could not connect to partition leader
exemplary-birds.master:9092. Error message: Failed to open a socket.
[debug] application - Getting partition offsets for topic ui_test_topic_4

What that means too many files open, is that mean the insufficient local
memory?

thanks

Alec Li