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Date: Mon, 6 Feb 2012 13:27:18 -0800
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Subject: Re: Cassandra OOM - 1.0.2
From: Ajeet Grewal <asgrewal@gmail.com>
To: user@cassandra.apache.org
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Here are the last few lines of strace (of one of the threads). There
are a bunch of mmap system calls. Notice the last mmap call a couple
of lines before the trace ends. Could the last mmap call fail?

== BEGIN STRACE ==
mmap(NULL, 2147487599, PROT_READ, MAP_SHARED, 37, 0xbffffb000) = 0x7709b54000
fstat(37, {st_mode=S_IFREG|0644, st_size=59568105422, ...}) = 0
mmap(NULL, 2147455553, PROT_READ, MAP_SHARED, 37, 0xc7fffb000) = 0x7789b55000
fstat(37, {st_mode=S_IFREG|0644, st_size=59568105422, ...}) = 0
mmap(NULL, 2147483522, PROT_READ, MAP_SHARED, 37, 0xcffff4000) = 0x7809b4f000
fstat(37, {st_mode=S_IFREG|0644, st_size=59568105422, ...}) = 0
mmap(NULL, 1586100174, PROT_READ, MAP_SHARED, 37, 0xd7fff3000) = 0x7889b4f000
dup2(40, 37)                            = 37
close(37)                               = 0
open("/home/y/var/fresh_cassandra/data/fresh/counter_object-h-4240-Filter.db",
O_RDONLY) = 37
.
.
.
.
close(37)                               = 0
futex(0x2ab5a39754, FUTEX_WAKE, 1)      = 1
futex(0x2ab5a39750, FUTEX_WAKE, 1)      = 1
futex(0x40116940, FUTEX_WAKE, 1)        = 1
mmap(0x41a17000, 12288, PROT_NONE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = 0x41a17000
rt_sigprocmask(SIG_SETMASK, [QUIT], NULL, 8) = 0
_exit(0)                                = ?
== END STRACE ==

-- 
Regards,
Ajeet