Re: Freenet hangs and restarts shortly after startup

On Tuesday 09 Oct 2012 13:10:43 guido wrote:
> Am Dienstag, 9. Oktober 2012, 10:33:35 schrieb Matthew Toseland:
> > On Monday 08 Oct 2012 22:06:59 guido wrote:
> > > > Nothing obvious there. Are you sure it was using heavy CPU at the time?
> > > 
> > > It's always using this much CPU, including at that time. I checked. (With
> > > top)> 
> > > > If so it might be a garbage collection issue
> > > >
> > > >.... how much memory is Freenet allowed in wrapper.conf?
> > > 
> > > wrapper.java.maxmemory is set to 1095. I can find no other setting related
> > > to memory limits in there.
> > > 
> > > Here's the entire file:
> > > 
> > > wrapper.java.command=java
> > > wrapper.working.dir=../
> > > wrapper.java.mainclass=freenet.node.NodeStarter
> > > wrapper.java.classpath.1=freenet.jar
> > > wrapper.java.classpath.2=freenet-ext.jar
> > > wrapper.java.library.path.1=lib
> > > wrapper.java.initmemory=60
> > > # Increased because of slot filters in 1385
> > > wrapper.java.maxmemory=1095
> > > wrapper.java.additional.1=-Dnetworkaddress.cache.ttl=0
> > > wrapper.java.additional.2=-Dnetworkaddress.cache.negative.ttl=0
> > > wrapper.java.additional.3=-enableassertions:freenet
> > 
> > Okay, add this line here:
> > 
> > wrapper.java.additional.4=-Xloggc:freenet.loggc
> > 
> > Then shut down and start up Freenet, and watch freenet.loggc. Are you seeing
> > a lot of "Full GC" ?
> 
> How much is a lot? After ~30 minutes of uptime, I get this:
> 
> $ grep Full freenet.loggc 
> 173.713: [Full GC 59569K->30609K(66752K), 0.1119400 secs]
> 194.924: [Full GC 42692K->42510K(84224K), 0.1144190 secs]
> 224.924: [Full GC 66661K->66538K(116160K), 0.0961980 secs]
> 233.162: [Full GC 78622K->76056K(129216K), 0.1531610 secs]
> 276.978: [Full GC 110170K->101941K(193472K), 0.1233060 secs]
> 300.933: [Full GC 147726K->111491K(230784K), 0.1306090 secs]
> 327.116: [Full GC 160279K->130951K(279360K), 0.1293510 secs]
> 355.853: [Full GC 172159K->124036K(306432K), 0.1917980 secs]
> 380.778: [Full GC 159951K->137945K(351552K), 0.1342150 secs]
> 815.527: [Full GC 186389K->126615K(232320K), 0.1548210 secs]
> 927.181: [Full GC 165409K->116784K(307136K), 0.1476340 secs]

Well each one lasts less than a seconf and they are happening much less than once per second. So no, that's not a lot.
=> It's not a garbage collection issue.

I guess you could get a few more stack dumps and send me them? Make sure that it's using loads of CPU at the time.

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