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Question by Roy L. · Jul 21, 2015 at 04:55 AM ·

No chart data and purepaths are corrupted

I have a very standard 2 Web Server + 4 Java Agent setup.  I am using the dT Cloud instance.  It has never worked properly.  As soon as I thrown on some load, about 5-10 minutes in data stops coming in (charts just drop off).  I do see new PP's through PP dashlet but unclear if it's capturing everything.  In the incidents view, I see >= 1000 purepaths are corrupted.  That's the only clue I can see.  I've looked at the server and FE server monitoring charts and can't discern anything that jumps out.

I am not sure what could cause this corruption and is this related to the lack of data through charts?  Any advice on the cause or what to check is appreciated!

 

 

 

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Answer by Reinhard W. · Jul 21, 2015 at 01:21 PM

Roy,

did you check the collectors? Might there be a bottleneck between the collectors and the agents? Where are your collectors running?

Reinhard

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avatar image Roy L. · Jul 21, 2015 at 01:25 PM 0
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It is a single collector running on a node serving backoffice (staff facing) traffic.  That node is not instrumented with a Java agent.  However, it is in same network as the nodes that do have Java agents.  What / how can I check if it is being overrun?

UPDATE: Thanks for the hint Reinhard.  I do see this a few times in Collector.0.0.log.  What do you think?

2015-07-21 13:47:56 WARNING [OutOfProcessEventHandler] Exception happened while trying to send buffer. Retry to send buffer...
2015-07-21 13:47:56 WARNING [OutOfProcessEventHandler] com.dynatrace.diagnostics.communication.tcp.exception.CommunicationException: class java.net.SocketException: Connection timed out, while executing request: class com.dynatrace.diagnostics.collector.OutOfProcessEventHandler$SendBufferRequest
    at com.dynatrace.diagnostics.communication.tcp.core.DefaultRequest.handleException(DefaultRequest.java:15)
    at com.dynatrace.diagnostics.communication.tcp.session.DefaultSession$SessionRequest.handleException(DefaultSession.java:757)
    at com.dynatrace.diagnostics.communication.tcp.connection.ManagedSocketConnection.handleException(ManagedSocketConnection.java:56)
    at com.dynatrace.diagnostics.communication.tcp.connection.ManagedSocketConnection.access$000(ManagedSocketConnection.java:26)
    at com.dynatrace.diagnostics.communication.tcp.connection.ManagedSocketConnection$RequestWrapper.handleException(ManagedSocketConnection.java:75)
    at com.dynatrace.diagnostics.communication.tcp.connection.SocketConnection.handleException(SocketConnection.java:153)
    at com.dynatrace.diagnostics.communication.tcp.connection.SocketConnection.executeRequest(SocketConnection.java:143)
    at com.dynatrace.diagnostics.communication.tcp.connection.ManagedSocketConnection.executeRequest(ManagedSocketConnection.java:98)
    at com.dynatrace.diagnostics.communication.tcp.session.DefaultSession.executeRequestOnConnection(DefaultSession.java:631)
    at com.dynatrace.diagnostics.communication.tcp.session.DefaultService.executeRequestOnConnection(DefaultService.java:126)
    at com.dynatrace.diagnostics.collector.OutOfProcessEventHandler.sendBuffer(SourceFile:540)
    at com.dynatrace.diagnostics.collector.shared.protocol.server.SendQueue$BufferSender.run(SourceFile:158)
Caused by: java.net.SocketException: Connection timed out
    at java.net.SocketInputStream.socketRead0(Native Method)
    at java.net.SocketInputStream.read(SocketInputStream.java:152)
    at java.net.SocketInputStream.read(SocketInputStream.java:122)
    at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
    at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
    at com.dynatrace.diagnostics.sdk.io.IoStatsAwareInputStream.read(IoStatsAwareInputStream.java:19)
    at java.io.DataInputStream.readBoolean(DataInputStream.java:242)
    at com.dynatrace.diagnostics.sdk.io.DataInputStreamDataInput.readBoolean(DataInputStreamDataInput.java:54)
    at com.dynatrace.diagnostics.communication.tcp.session.DefaultSession$SessionRequest.executeRequestResponse(DefaultSession.java:723)
    at com.dynatrace.diagnostics.communication.tcp.connection.ManagedSocketConnection$RequestWrapper.executeRequestResponse(ManagedSocketConnection.java:70)
    at com.dynatrace.diagnostics.communication.tcp.connection.SocketConnection.executeRequest(SocketConnection.java:135)
    ... 5 more
2015-07-21 13:47:56 WARNING [DefaultSession] unable to get outbound connection - session costco-hybris.compuwareapmaas.com:Plain:Uncompressed:Collector is in status: Disconnected. subsequent messages of this kind will be logged to log level FINE.
2015-07-21 15:37:02 WARNING [OutOfProcessEventHandler] Exception happened while trying to send buffer. Retry to send buffer...
2015-07-21 15:37:02 WARNING [OutOfProcessEventHandler] com.dynatrace.diagnostics.communication.tcp.exception.CommunicationException: class java.net.SocketException: Connection timed out, while executing request: class com.dynatrace.diagnostics.collector.OutOfProcessEventHandler$SendBufferRequest
    at com.dynatrace.diagnostics.communication.tcp.core.DefaultRequest.handleException(DefaultRequest.java:15)
    at com.dynatrace.diagnostics.communication.tcp.session.DefaultSession$SessionRequest.handleException(DefaultSession.java:757)
    at com.dynatrace.diagnostics.communication.tcp.connection.ManagedSocketConnection.handleException(ManagedSocketConnection.java:56)
    at com.dynatrace.diagnostics.communication.tcp.connection.ManagedSocketConnection.access$000(ManagedSocketConnection.java:26)
    at com.dynatrace.diagnostics.communication.tcp.connection.ManagedSocketConnection$RequestWrapper.handleException(ManagedSocketConnection.java:75)
    at com.dynatrace.diagnostics.communication.tcp.connection.SocketConnection.handleException(SocketConnection.java:153)
    at com.dynatrace.diagnostics.communication.tcp.connection.SocketConnection.executeRequest(SocketConnection.java:143)
    at com.dynatrace.diagnostics.communication.tcp.connection.ManagedSocketConnection.executeRequest(ManagedSocketConnection.java:98)
    at com.dynatrace.diagnostics.communication.tcp.session.DefaultSession.executeRequestOnConnection(DefaultSession.java:631)
    at com.dynatrace.diagnostics.communication.tcp.session.DefaultService.executeRequestOnConnection(DefaultService.java:126)
    at com.dynatrace.diagnostics.collector.OutOfProcessEventHandler.sendBuffer(SourceFile:540)
    at com.dynatrace.diagnostics.collector.shared.protocol.server.SendQueue$BufferSender.run(SourceFile:158)
Caused by: java.net.SocketException: Connection timed out
    at java.net.SocketInputStream.socketRead0(Native Method)
    at java.net.SocketInputStream.read(SocketInputStream.java:152)
    at java.net.SocketInputStream.read(SocketInputStream.java:122)
    at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
    at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
    at com.dynatrace.diagnostics.sdk.io.IoStatsAwareInputStream.read(IoStatsAwareInputStream.java:19)
    at java.io.DataInputStream.readBoolean(DataInputStream.java:242)
    at com.dynatrace.diagnostics.sdk.io.DataInputStreamDataInput.readBoolean(DataInputStreamDataInput.java:54)
    at com.dynatrace.diagnostics.communication.tcp.session.DefaultSession$SessionRequest.executeRequestResponse(DefaultSession.java:723)
    at com.dynatrace.diagnostics.communication.tcp.connection.ManagedSocketConnection$RequestWrapper.executeRequestResponse(ManagedSocketConnection.java:70)
    at com.dynatrace.diagnostics.communication.tcp.connection.SocketConnection.executeRequest(SocketConnection.java:135)
    ... 5 more
2015-07-21 15:37:02 WARNING [DefaultSession] unable to get outbound connection - session costco-hybris.compuwareapmaas.com:Plain:Uncompressed:Collector is in status: Disconnected. subsequent messages of this kind will be logged to log level FINE.
avatar image Reinhard W. Roy L. · Jul 21, 2015 at 02:18 PM 0
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The Collector.0.log file would be the place to go if there are any suspicious items in there. Also if the network connection to the server has dropped or is slow.

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