Bug 546099

Created attachment 377351 [details]
File: backtrace

Relevant part of the backtrace seems to be:

#7  <signal handler called>
No symbol table info available.
#8  ciTypeFlow::build_loop_tree (this=<value optimized out>, 
    blk=<value optimized out>)
    at /usr/src/debug/icedtea6-1.6/openjdk/hotspot/src/share/vm/ci/ciTypeFlow.cpp:2482
        lp = 0x0
        succ = <value optimized out>
        iter = {<StackObj> = {<No data fields>}, _pred = 0xa5a1e58, _index = 
    0, _succ = 0x9f35628}
        innermost = <value optimized out>
#9  0x00d0785e in ciTypeFlow::df_flow_types (this=<value optimized out>, 
    start=<value optimized out>, do_flow=<value optimized out>, 
    temp_vector=<value optimized out>, temp_set=<value optimized out>)
    at /usr/src/debug/icedtea6-1.6/openjdk/hotspot/src/share/vm/ci/ciTypeFlow.cpp:2635
        blk = <value optimized out>
        root_head = <value optimized out>
        root_tail = <value optimized out>
        next_po = <value optimized out>
        stk = {<GenericGrowableArray> = {<ResourceObj> = {<No data fields>}, 
            _len = 2, _max = 100, _arena = 0x7ebf5c}, _data = 0xa5a1900}
        dummy = <value optimized out>
        root_set = <value optimized out>
        size = <value optimized out>
#10 0x00d08093 in ciTypeFlow::flow_types (this=<value optimized out>)
    at /usr/src/debug/icedtea6-1.6/openjdk/hotspot/src/share/vm/ci/ciTypeFlow.cpp:2670
        start = <value optimized out>
        start_state = 0x9f35628
#11 0x00d0817d in ciTypeFlow::do_flow (this=<value optimized out>)
    at /usr/src/debug/icedtea6-1.6/openjdk/hotspot/src/share/vm/ci/ciTypeFlow.cpp:2831
No locals.
#12 0x00cf20f8 in ciMethod::get_osr_flow_analysis (
    this=<value optimized out>, osr_bci=<value optimized out>)
    at /usr/src/debug/icedtea6-1.6/openjdk/hotspot/src/share/vm/ci/ciMethod.cpp:333
        env = 0x7ebf58
        flow = <value optimized out>
#13 0x00fed47e in Parse::Parse (this=<value optimized out>, 
    caller=<value optimized out>, parse_method=<value optimized out>, 
    expected_uses=<value optimized out>)
    at /usr/src/debug/icedtea6-1.6/openjdk/hotspot/src/share/vm/opto/parse1.cpp:451
        entry_map = 0x9f35628
        log = 0x0
        md = <value optimized out>
        caller_nn = 0x10
        entry_block = <value optimized out>

So we get lp = 0x0 at ciTypeFlow.cpp:2482

    // Check for irreducible loop.
    // Successor has already been visited. If the successor's loop head
    // has already been post-visited, then this is another entry into the loop.
    while (lp->head()->is_post_visited() && lp != loop_tree_root()) {

And obviously dereferencing lp isn't going to work...

Might this be http://bugs.sun.com/view_bug.do?bug_id=6854812 ?
It might or might not, the symptom seems to be the same (lp being NULL), but we are seeing it at the start of the while loop, while in that case it is observed (through an assert) at the end of that same loop.

(In reply to comment #1)
> Created an attachment (id=377351) [details]
> File: backtrace  

Usually, this crash happens when the network condition is bad or the network simply goes down. Actually, the BT software makes the network down in the first place.

*** Bug 556595 has been marked as a duplicate of this bug. ***

*** Bug 561131 has been marked as a duplicate of this bug. ***

If this is the same bug I've run into, it is super easy to reproduce. Just have Vuze running, suspend your system, then restart it. It generally crashes within a few minutes of restarting. What I can read on the stack traces seem to point at network things being the cause. It must be when the network is getting reconnected after the suspend. I also filed a bug about this with Iced Tea.
http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=422

I've since switched over to the Sun JDK 1.6.0_18 a few days ago and it hasn't crashed at all while restarting after a suspend.

*** Bug 576165 has been marked as a duplicate of this bug. ***

*** Bug 578993 has been marked as a duplicate of this bug. ***

*** Bug 581051 has been marked as a duplicate of this bug. ***

*** Bug 588983 has been marked as a duplicate of this bug. ***

*** Bug 592268 has been marked as a duplicate of this bug. ***

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