Hello all...
I have received no responses on this problem.
I am still having this issue once or twice a week.
After a number of searches in the past weeks I've gained little in
terms of understanding what happens.
In my search I found out a defect report against Oracle's JVM, that
might be connected to the issue:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7118373
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=2223521
I also came up with a mention in some blog:
http://blog.fuseyism.com/index.php/category/openjdk/
(sorry, could not come up with a more legit source).
From the blog post I can see, that the mentioned defect is noted in
'Release 2.3.0 (2012-08-15)', which is a funny two days after my post.
May I have your comments? Does this sound like a OpenJDK defect? Is it
possible that it has been fixed in the meantime? From the looks on my
machine it seems it still uses OpenJDK 2.1.1 (openjdk-7-jdk
7~u3-2.1.1~pre1-1ubuntu3).
Please advise!
2012/8/29 Lachezar Dobrev <l.dobrev_at_gmail.com>:
> Hello colleagues,
>
> Recently we switched from Tomcat to Glassfish.
> However I noticed, that at certain point (unknown as of yet) the
> Glassfish server stops responding. I can't even stop it correctly
> (asadmin stop-domain hangs!).
>
> - Ubuntu Server - 12.04 (precise)
> - Intel Xeon (x64 arch)
> - java version "1.7.0_03"
> - OpenJDK 64-Bit Server VM (build 22.0-b10, mixed mode)
> - Glassfish 3.1.2 (no upgrades pending)
>
> The server serves via a JK Connector with a façade Apache server using mod_jk.
>
> The server runs only three applications (and the admin interface).
> All applications use Spring Framework. One uses JPA to a PostgreSQL on
> the local host, one uses an ObjectDB JPA, two use JDBC pool
> connections to a remote Microsoft SQL Server.
>
> The culprit seems to be some kind of File Descriptor leak.
> Initially the server died within a day or two. I had to increase the
> open files limit (s1024/h4096) to (s65536/h65536) thinking this may be
> just because too many files need to be opened. However that just
> postponed the server death to about one week uptime.
>
> I was able to make some checks at the latest crash, since I was
> awake in 3AM. What I found out was that there were an unbelievable
> number of lost (unclosed) pipes:
>
>> java 30142 glassfish 467r FIFO 0,8 0t0 4659245 pipe
>> java 30142 glassfish 468w FIFO 0,8 0t0 4659245 pipe
>> java 30142 glassfish 469u 0000 0,9 0 6821 anon_inode
>> java 30142 glassfish 487r FIFO 0,8 0t0 4676297 pipe
>> java 30142 glassfish 488w FIFO 0,8 0t0 4676297 pipe
>> java 30142 glassfish 489u 0000 0,9 0 6821 anon_inode
>
> The logs show a very long quiet period, just before the failure the
> log shows a normal log line from the actual server working (one of the
> applications).
> Then the log rolls and starts rolling every second. The failures
> start with (attached error_one.txt)
>
> The only line that has been obfuscated is the one with .... in it.
> The com.planetj... is a filter used to implement gzip compression
> (input and output) since I could not find how to configure that in
> Glassfish.
> The org.springframework... is obviously the Spring Framework.
>
> The log has an enormous amount (2835 for 19 seconds) of those
> messages. The messages are logged from within the same thread (same
> _ThreadID and _ThreadName), which leads me to believe all messages are
> a result of the processing of a single request.
> Afterwards the server begins dumping a lot of messages like
> (attached error_two.txt).
> The server is effectively blocked from that time on.
>
> At that point lsof shows 64K open files from Glassfish, the enormous
> majority being open popes (three descriptors each).
>
> I am at a loss here... The server currently needs either a periodic
> restart, or I need to 'kill' it when it blocks.
>
> I've been digging for this error around the Internet, and the
> closest I've seen has been due to not closing (leaking) Selectors.
> Please advise!