Re: Long freeze during tomcat start

It seemed I was getting close to a solution on this issue, so I'm posting this again in the hope that someone will know what's going wrong. This IPv6 ping doesn't work, and it's causing a lengthy freeze in the tomcat start-up (see bottom). This is on Debian Etch linux 2.6.20 - can anyone

Re: Long freeze during tomcat start

Admittedly grasping at straws here, but does an IPv6 ping to localhost work the same on both boxes, e.g.: [EMAIL PROTECTED]:~$ ping6 ::1 PING ::1(::1) 56 data bytes 64 bytes from ::1: icmp_seq=1 ttl=64 time=0.047 ms 64 bytes from ::1: icmp_seq=2 ttl=64 time=0.039 ms --- ::1 ping statistics --- 2

Re: Long freeze during tomcat start

No, on the box that doesn't work, I get this: [EMAIL PROTECTED]:~$ sudo ping6 ::1 Password: PING ::1(::1) 56 data bytes ping: sendmsg: Operation not permitted ping: sendmsg: Operation not permitted ping: sendmsg: Operation not permitted ping: sendmsg: Operation not permitted --- ::1 ping

Re: Long freeze during tomcat start

I'm still frustrated by this freeze. Looking at this thread dump, I can see it must be the main thread that's hanging - but how can I work out anything more regarding the problem? I've done all I can think of to open up the machine it's running on - stopping all other unnecessary processes

Re: Long freeze during tomcat start

I'd think it's more likely to be timing out while resolving a hostname via DNS, but starting tomcat via strace should show you exactly where it is pausing. On Thu, May 22, 2008 at 5:08 AM, Adam Hardy [EMAIL PROTECTED] wrote: I'm still frustrated by this freeze. Looking at this thread dump, I

Re: Long freeze during tomcat start

Found it! But I think my knowledge of linux system calls and kernel functions is letting me down now. Presumably that is port 48669, which should be open - but is it a DNS call? If it is a DNS call, then the DNS server on the same machine should serve it - piping it out to the net, presumably.

Re: Long freeze during tomcat start

Can you compare that output to a capture from the box where you don't see the pause? I wonder if it's a difference in IPv4/IPv6 configuration between the boxes... On Thu, May 22, 2008 at 8:24 AM, Adam Hardy [EMAIL PROTECTED] wrote: Found it! But I think my knowledge of linux system calls and

Re: Long freeze during tomcat start

I think this is the equivalent part of the strace log from another machine on the LAN: socket(PF_INET6, SOCK_STREAM, IPPROTO_IP) = 10 listen(10, 1) = 0 getsockname(10, {sa_family=AF_INET6, sin6_port=htons(54792), inet_pton(AF_INET6, ::, sin6_addr), sin6_flowinfo=0,

Re: Long freeze during tomcat start

I'm assuming the pause you saw was at the following line? connect(11, {sa_family=AF_INET6, sin6_port=htons(48669), inet_pton(AF_INET6, ::1, sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = -1 ETIMEDOUT (Connection timed out) That looks like a connect attempt to the IPv6 loopback address (?)

Re: Long freeze during tomcat start

Tell you the truth, I can only assume IPv6 stuff is configured to the debian etch defaults - although that might have changed between the date I installed the no-pause-box and the date I installed the problem box. no-pause-box: eth0 Link encap:Ethernet HWaddr 00:10:DC:79:FF:8F

Long freeze during tomcat start

I've been trying to solve this problem for a couple of hours now and I can't see any solution on google or in the archives. I have tomcat 6.0.13 and java 1.5.0_12 running on debian linux 2.6, my own installation, not the debian packages. I stripped the tomcat config down to the bare minimum,

Re: Long freeze during tomcat start

Adam Hardy wrote: I've been trying to solve this problem for a couple of hours now and I can't see any solution on google or in the archives. I have tomcat 6.0.13 and java 1.5.0_12 running on debian linux 2.6, my own installation, not the debian packages. I stripped the tomcat config down

Re: Long freeze during tomcat start

just do two thread dumps during the freeze kill -3 tomcat process id sleep 5 kill -3 tomcat process id the thread dump will identify where it is hanging, and it gets output to std.out, by default to catalina.out Filip Adam Hardy wrote: I've been trying to solve this problem for a couple of

Re: Long freeze during tomcat start

Thanks for the advice. Here are the two thread dumps, with a 5 sec pause between. It looks like it's waiting on a network connection. Is that what you would deduce? 19-May-2008 23:04:32 org.apache.tomcat.util.modeler.BaseModelMBean preRegister FINE: preRegister [EMAIL PROTECTED]