Interprocess communication signals
 Technote (troubleshooting)
 
Problem(Abstract)
What is a signal and why does this matter for WebSphere® Application Server?
 
Resolving the problem
Signals are used for interprocess communication. For problem determination, it is often helpful to send signals to the WebSphere processes.
Signals

HUP 1 hangup
INT 2 interrupt (rubout)
QUIT 3 quit (ASCII FS)
ILL 4 illegal instruction (not reset when caught)
TRAP 5 trace trap (not reset when caught)
IOT 6 IOT instruction
ABRT 6 used by abort, replace SIGIOT in the future
EMT 7 EMT instruction
FPE 8 floating point exception
KILL 9 kill (cannot be caught or ignored)
BUS 10 bus error
SEGV 11 segmentation violation
SYS 12 bad argument to system call
PIPE 13 write on a pipe with no one to read it
ALRM 14 alarm clock
TERM 15 software termination signal from kill
USR1 16 user defined signal 1
USR2 17 user defined signal 2
CLD 18 child status change
CHLD 18 child status change alias (POSIX)
PWR 19 power-fail restart
WINCH 20 window size change
URG 21 urgent socket condition
POLL 22 pollable event occurred
IO SIGPOLL socket I/O possible (SIGPOLL alias)
STOP 23 stop (cannot be caught or ignored)
TSTP 24 user stop requested from tty
CONT 25 stopped process has been continued
TTIN 26 background tty read attempted
TTOU 27 background tty write attempted
VTALRM 28 virtual timer expired
PROF 29 profiling timer expired
XCPU 30 exceeded cpu limit
XFSZ 31 exceeded file size limit
WAITING 32 process's lwps are blocked
LWP 33 special signal used by thread library
FREEZE 34 special signal used by CPR
THAW 35 special signal used by CPR

For additional information, see the following White Paper on signals: What is a signal and why does this matter for WebSphere Application Server.

Each operating system has a unique list of signals.
 
 
Cross Reference information
Segment Product Component Platform Version Edition
Application Servers Runtimes for Java Technology Java SDK
 
 


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server
Operating system(s): Solaris
Software version: 6.0
Software edition:
Reference #: 1169590
IBM Group: Software Group
Modified date: Jan 23, 2007