How Linux kills Zombie processes

Problem Description:

Shell >Toptop- One: -: -Up630Days +: at,1User, load Average:0.23,0.81,1.07Tasks:389Total1Running385Sleeping,0Stopped3Zombiecpu (s):3.6%us,0.8%sy,0.0%ni,95.3%ID,0.0%wa,0.0%hi,0.3%si,0.0%stmem:24596748k Total, 3346824k used, 21249924k Free, 50344k buffersswap:8388600k Total, 9704k used, 8378896k Free, 1649016k Cached

# found There are three zombie processes 3 Zombie, this is because the parent process first killed the resulting

Shell >PSAux |grepZuser PID%cpu%MEM VSZ RSS TTY STAT START time Commandroot7811  0.0  0.0      0     0? Zs One: the   0:xx[Yiic_elastic_kt] <defunct>Root8446  0.0  0.0 103260   872pts/1r+ One: -   0:xx grepZ

# no face, it's been dead two, it's probably the sun.

Kill -97811

# This is not dead, but also tenacious survival

Workaround:

Shell >PS-ef |grepDefunctroot8850  8840  0  One: -?xx:xx:xx[Yiic_elastic_kt] <defunct>Root8851  8842  0  One: -?xx:xx:xx[Yiic_elastic_kt] <defunct>Root8853  8843  0  One: -?xx:xx:xx[Yiic_elastic_kt] <defunct>Root8855  8839  0  One: -?xx:xx:xx[Yiic_elastic_kt] <defunct>Root9066  7621  0  One: -pts/1    xx:xx:xx grepDefunct

# I went and ran out of three ...

PS grep awk ' {print $} ' Xargs Kill {}

# $ $ is the parent process of these zombie processes PID (PPID), kill it!

PS grep defunctroot      10008  7621  0 One: pts/1: xx: The    grep defunct

# It's gone!

How Linux kills Zombie processes