Hello,

we have a system that we are testing in production and I noticed a
problem since yesterday. Upon browsing the logs I started tail:ing the
main one. The last log entry before was from 09:56 yesterday.

I then generate some more traffic, tail informs me that the file was
truncated (ie log4net/rollingfileappender shuffled the logdata around).

When I revisit the previous log file (the one before the current one) I
find that it only has log entries up until 09:14!! Log data from 09:14
to 09:56 has vanished. I feverishly tried searching but to no avail.

In order to avoid this, I wonder: Are there any notes / info that seem
applicable? Hopefully, this is a "duh" question!

I will go research on my own, just thought I'd start here. Any hints
appreciated!

Thankyou in advance!

/mawi

PS

(a) Here is end of "latest-1" log file (EOLs truncated for brevity):

2007-05-20 09:14:20,542 [MessageProcessorThread] DEBUG FileProcessor
⏠]: Will parse file at
2007-05-20 09:14:20,557 [MessageProcessorThread] DEBUG FileProcessor
⏠]: Will parse file at
2007-05-20 09:14:20,557 [MessageProcessorThread] DEBUG FileProcessor
⏠]: Will parse file at
2007-05-20 09:14:21,026 [MessageProcessorThread] DEBUG FileProcessor
⏙]: Parsing complete.

(b) Here is output from tail, showing log data before truncating and
truncating transition (stuff omitted for brevity):

T:\log>tail visionlinklib.log -f
   at System.ServiceModel.Channels.ServiceChannel.Call(String action,
Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[]
outs)
   at
System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCa
llMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage
message)

Exception rethrown at Ύ]:
   at
System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage
reqMsg, IMessage retMsg)
   at
System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData&
msgData, Int32 type) [...] MonitorService.cs:line 151
2007-05-20 09:56:15,544 [MessageProcessorThread] WARN  Dispatcher 𖏠]:
Unknown message: No handler wants a message of this type:  [...]
.Network.Protocol.MessageParsing.NewRollIDRequestMessage. Thanks for
trying!|| [...] .Network.Dispatcher.Dispatch( [...] \Dispatcher.cs:104)
==> visionlinklib.log: file truncated <==
2007-05-21 14:42:46,747 󞪘] DEBUG MonitorService 𖏢]: Monitor
connected.|| [...] .Monitoring.MonitorService.Connect( [...]
\MonitorService.cs:106)
tail: visionlinklib.log: Invalid argument
tail: no files remaining

T:\log>tail visionlinklib.log -f

 [...]