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https://issues.apache.org/jira/browse/YARN-6763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16076381#comment-16076381
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Bibin A Chundatt edited comment on YARN-6763 at 7/7/17 6:02 PM:
----------------------------------------------------------------
{noformat}
root@bibinpc:/proc/1452# ps -ef | grep systemd
root 256 1 0 Jul04 ? 00:00:03 /lib/systemd/systemd-journald
root 289 1 0 Jul04 ? 00:00:00 /lib/systemd/systemd-udevd
root 942 1 0 Jul04 ? 00:00:00 /lib/systemd/systemd-logind
root 954 1 0 Jul04 ? 00:00:00 /sbin/cgmanager -m name=systemd
message+ 963 1 0 Jul04 ? 00:04:10 /usr/bin/dbus-daemon --system
--address=systemd: --nofork --nopidfile --systemd-activation
systemd+ 1066 1 0 Jul04 ? 00:00:01 /lib/systemd/systemd-resolved
bibin 1452 1 0 Jul04 ? 00:00:00 /lib/systemd/systemd --user
bibin 1478 1452 0 Jul04 ? 00:00:57 /usr/bin/dbus-daemon --session
--address=systemd: --nofork --nopidfile --systemd-activation
root 2450 1 0 Jul04 ? 00:00:00 /lib/systemd/systemd --user
root 2459 27405 0 16:51 pts/7 00:00:00 grep --color=auto systemd
root 2475 2450 0 Jul04 ? 00:00:00 /usr/bin/dbus-daemon --session
--address=systemd: --nofork --nopidfile --systemd-activation
{noformat}
user is started with systemd user session *bibin* the process id is 1452.
So the daemon *Orphan process* parent is not *1* .
{noformat}
root@bibinpc:~# ps -ef | grep sleep
bibin 3342 1545 0 Jul05 ? 00:00:00 sleep infinity
root 25169 1452 0 14:03 ? 00:00:00 sleep 300
{noformat}
The orphan is not added to parent based on *session ID* since the parent for
daemon process is !=1
{code}
if (!pID.equals("1")) {
ProcessInfo pInfo = entry.getValue();
String ppid = pInfo.getPpid();
// If parent is init and process is not session leader,
// attach to sessionID
if (ppid.equals("1")) {
String sid = pInfo.getSessionId().toString();
if (!pID.equals(sid)) {
ppid = sid;
}
}
{code}
was (Author: bibinchundatt):
{noformat}
root@bibinpc:/proc/1452# ps -ef | grep systemd
root 256 1 0 Jul04 ? 00:00:03 /lib/systemd/systemd-journald
root 289 1 0 Jul04 ? 00:00:00 /lib/systemd/systemd-udevd
root 942 1 0 Jul04 ? 00:00:00 /lib/systemd/systemd-logind
root 954 1 0 Jul04 ? 00:00:00 /sbin/cgmanager -m name=systemd
message+ 963 1 0 Jul04 ? 00:04:10 /usr/bin/dbus-daemon --system
--address=systemd: --nofork --nopidfile --systemd-activation
systemd+ 1066 1 0 Jul04 ? 00:00:01 /lib/systemd/systemd-resolved
bibin 1452 1 0 Jul04 ? 00:00:00 /lib/systemd/systemd --user
bibin 1478 1452 0 Jul04 ? 00:00:57 /usr/bin/dbus-daemon --session
--address=systemd: --nofork --nopidfile --systemd-activation
root 2450 1 0 Jul04 ? 00:00:00 /lib/systemd/systemd --user
root 2459 27405 0 16:51 pts/7 00:00:00 grep --color=auto systemd
root 2475 2450 0 Jul04 ? 00:00:00 /usr/bin/dbus-daemon --session
--address=systemd: --nofork --nopidfile --systemd-activation
{noformat}
*Orphan process* parent is not *1*
{noformat}
root@bibinpc:~# ps -ef | grep sleep
bibin 3342 1545 0 Jul05 ? 00:00:00 sleep infinity
root 25169 1452 0 14:03 ? 00:00:00 sleep 300
{noformat}
The orphan is not added to parent based on *session ID*
{code}
if (!pID.equals("1")) {
ProcessInfo pInfo = entry.getValue();
String ppid = pInfo.getPpid();
// If parent is init and process is not session leader,
// attach to sessionID
if (ppid.equals("1")) {
String sid = pInfo.getSessionId().toString();
if (!pID.equals(sid)) {
ppid = sid;
}
}
{code}
> TestProcfsBasedProcessTree#testProcessTree fails in trunk
> ---------------------------------------------------------
>
> Key: YARN-6763
> URL: https://issues.apache.org/jira/browse/YARN-6763
> Project: Hadoop YARN
> Issue Type: Test
> Reporter: Bibin A Chundatt
> Assignee: Nathan Roberts
> Priority: Minor
>
> {code}
> Tests run: 5, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 7.949 sec <<<
> FAILURE! - in org.apache.hadoop.yarn.util.TestProcfsBasedProcessTree
> testProcessTree(org.apache.hadoop.yarn.util.TestProcfsBasedProcessTree) Time
> elapsed: 7.119 sec <<< FAILURE!
> java.lang.AssertionError: Child process owned by init escaped process tree.
> at org.junit.Assert.fail(Assert.java:88)
> at org.junit.Assert.assertTrue(Assert.java:41)
> at
> org.apache.hadoop.yarn.util.TestProcfsBasedProcessTree.testProcessTree(TestProcfsBasedProcessTree.java:184)
> {code}
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