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8067486: Add diagnostics for Exception: Read from closed pipe hang

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Reviewed-by: lancea
This commit is contained in:
Roger Riggs 2014-12-15 17:36:20 -05:00
parent 871abc48e4
commit ce6c1fa0fa
1 changed files with 34 additions and 1 deletions
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35
jdk/test/java/lang/Runtime/exec/SleepyCat.java
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@ -22,7 +22,7 @@
*/
/* @test
@bug 4843136 4763384
@bug 4843136 4763384 8044841
@summary Various race conditions caused exec'ed processes to have
extra unused file descriptors, which caused hard-to-reproduce hangs.
@author Martin Buchholz
@ -50,6 +50,8 @@ public class SleepyCat {
}
public void run() {
dumpState(deathRow); // before killing the processes dump all the state
timedOut = true;
destroy(deathRow);
}
@ -59,6 +61,37 @@ public class SleepyCat {
}
}
/**
* Temporary debugging code for intermittent failures.
* @param pids the processes to dump status for
*/
static void dumpState(Process... pids) {
if (!System.getProperty("os.name").contains("SunOS")) {
return;
}
try {
String[] psArgs = {"ps", "-elf"};
Process ps = new ProcessBuilder(psArgs).inheritIO().start();
ps.waitFor();
String[] sfiles = {"pfiles", "self"};
Process fds = new ProcessBuilder(sfiles).inheritIO().start();
fds.waitFor();
for (Process p : pids) {
if (p == null)
continue;
String[] pfiles = {"pfiles", Long.toString(p.getPid())};
fds = new ProcessBuilder(pfiles).inheritIO().start();
fds.waitFor();
String[] pstack = {"pstack", Long.toString(p.getPid())};
fds = new ProcessBuilder(pstack).inheritIO().start();
fds.waitFor();
}
} catch (IOException | InterruptedException i) {
i.printStackTrace();
}
}
private static boolean hang1() throws IOException, InterruptedException {
// Time out was reproducible on Solaris 50% of the time;
// on Linux 80% of the time.