2.4.1 Trouble types and the required data

Types of problems that can occur in an application server system are as follows:

Error message output

Error messages are output.
System down

The server process of the application server terminates abnormally.
Hang-up (No response)

There is no response to an application call.
Slow down

There is a response to an application call but the response time is excessive.

The following table describes the data to be acquired for each type of problem.

Table 2‒5: List of data to be acquired for each type of problem
Item No.	Type of material	Problem type
Item No.	Type of material	Error message output	System down	Hang-up (No response)	Slow down
1	Message log^#1	Y	Y	Y	Y
2	User log^#1	Y	Y	Y	Y
3	Exception log^#1	Y	Y	Y	Y
4	Maintenance log^#1	Y	Y	Y	Y
5	Trace based performance analysis	Y	Y	Y	Y
6	Thread dumps of JavaVM	Y	Y	Y	Y
7	GC logs of JavaVM	P	Y	Y	Y
8	Memory dump	--	Y	Y	Y
9	JavaVM log file^#2	--	Y	Y	Y
10	Error report files	--	Y	--	--
11	OS state or log	Y	Y	Y	Y
12	Statistical information of OS	P	Y	Y	Y
13	Definition information	Y	Y	Y	Y
14	Operation directory^#4	P	P	P	P
15	Resource setting	Y	Y	Y	Y
16	Web server log	Y	Y	Y	Y
17	JavaVM stack trace^#3	--	Y	--	--
18	Event log of the Explicit Memory Management functionality of JavaVM^#2	--	Y	Y	Y

Legend:

Y: Required

P: Whether to be acquired depends on the actual error contents

--: Do not acquire

#1

Log output by the Application Server component software.

#2

Output when JavaVM start option is specified. For details about acquisition options, see 4.10 JavaVM log (JavaVM log file). For details about options, see 14. Options for Invoking JavaVM in the uCosminexus Application Server Definition Reference Guide.

#3

Output only when using UNIX.

#4

The default working directories are Application-Server-installation-directory\CC\server\public (in Windows), or /opt/Cosminexus/CC/server/public (in UNIX).

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