On Fri, 25 Aug 2000, Santiago Gala wrote:
> I am experiencing a strange deadlock during cache updates. To me, it
> happens only with tomcat, under FreeBSD 1.1.8 green threads, and not
> under my other setups.
>
> It is related to DNS lookup. The symptoms are:
>
> After a while updating the cache, the VM hangs.
>
> In fact, this VM stops responding while there is a DNS lookup, but
> sometimes it freezes. It looks as if the thread "missed" the query
> response. This thread holds locks, including the IO Monitor lock, that
> stop the whole virtual machine.
>
> I have not seen a similar behaviour with my other setups, identical
> except:
>
> NT, jdk1.2.2, hotspot server
> NT jdk 1.3, hotspot server
> Linux, jdk1.1.7, with/without JIT, green threads
> Linux jdk1.2.2, with JIT, native threads
> Linux jdk1.3b9, hotspot client, native threads
>
> All ofthem work perfectly. The problem is the FreeBSD setup is the only
> available in my public "virtual" server... :-(((((
There is a java dns resolver that may work for you. It could
be a bit of work to implement thou. The package is called
dnsjava and a quick web search should find it. There is an
example of it's use in JAMES ( mail server project on
java.apache.org )
Cheers,
Pete
*--------------------------------------------------*
| Latrobe University, | Does the name 'Pavlov' |
| Bundoora, Australia | ring a bell ? |
*--------------------------------------------------*
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