Am 14.07.2015 22:11, schrieb Bobby Richardson:
Hello:
My organization uses Kannel logs everyday and is experiencing a
technical challenge recently.
For this issue, I searched through kannel.org and unfortunately could
not find any helpful solution.
From attached, you may see 2 SMPP objects (first one is a complete one;
lines between 1 and 16 and the second one is just a partial) with 2
different connection names (ie. SMPP[SMSC1_ATT_RSS] and
SMPP[SMSC2_ATT_RSS]) .
Before the second SMPP object starts, I expected “SMPP PDU dump ends.”
first and then “SMPP[SMSC2_ATT_RSS]: Got PDU:”. “SMPP[SMSC2_ATT_RSS]:
Got PDU:” was placed in line 14 before the first SMPP object ends.
Is this normal sequence? In many cases, I have seen “SMPP PDU dump
ends.” as an indication of end of a SMPP. And then after this, another
SMPP may start with “SMPP[SMSC2_ATT_RSS]: Got PDU:”.
Do you have any suggestion for how to let Kannel log records one SMPP
object at a time without getting mixed?
Is there any specific parameter in the Configuration file to control
this case?
Hello Bobby,
the log parts show that the "mixing" happens due to thread concurrency.
Since every SMPP SMSC connection runs in it's own thread, there is no
"guaranteed" order of thread execution and therefore also no "grantee"
in that a particular SMPP PDU dump is "in-line complete" before any
other vectorized in.
So, is this mixing a feature or a bug? It's a feature actually, since we
COULD use mutex locking to perform the SMPP PDU dump completely and then
release the lock, but this would generate a high concurrency delay on
the log file writing, and therefore also in the PDU processing itself.
Alvaro suggested a way to avoid this, by using individual smsc group
specific log-files.
We DO have code branches in our internal trees that allow mutex locking,
though we never used this in high IO scenarios.
If you need any further assistance, please feel free to email me.
--
Best Regards,
Stipe
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