Hello

We are having troubles with Cygnus. When we have some devices sending
information to Context Broker (and context broker subscripted to Cygnus,
sending information to Cosmos and CKAN), the log show errors

There are errors both ckan-channel and hdfs-channel

Here a subset of log.

02 Sep 2015 06:46:07,948 WARN [1701535537@qtp-1850408381-327]
(org.apache.flume.source.http.HTTPSource$FlumeHTTPServlet.doPost:203) -
Error appending event to channel. Channel might be full. Consider
increasing the channel capacity or make sure the sinks perform faster.
org.apache.flume.ChannelException: Unable to put batch on required channel:
org.apache.flume.channel.MemoryChannel

at
org.apache.flume.channel.ChannelProcessor.processEventBatch(ChannelProcessor.java:200)
at
org.apache.flume.source.http.HTTPSource$FlumeHTTPServlet.doPost(HTTPSource.java:201)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:814)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:401)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at
org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:945)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at
org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
at
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: org.apache.flume.ChannelException: Space for commit to queue
couldn't be acquired Sinks are likely not keeping up with sources, or the
buffer size is too tight
at org.apache.flume.channel.MemoryChannel

The complete log is available here:
https://dl.dropboxusercontent.com/u/2537618/cygnus_a.log

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[Created via e-mail received from: MAPT Talkykar <miguel@talkykar.com>]