RabbitMQ通用服务器rabbit_disk_monitor终止/ eheap_alloc：无法分配229520字节的内存（类型为“old_heap”）
问题描述：
RabbitMQ崩溃。 RabbitMQ多天（10-15天）正常工作。 我不明白为什么它坠毁。RabbitMQ通用服务器rabbit_disk_monitor终止/ eheap_alloc：无法分配229520字节的内存（类型为“old_heap”）
我使用Erlang的17.0
Erlang的创造转储文件崩溃的RabbitMQ 3.4.0。这表明
eheap_alloc: Cannot allocate 229520 bytes of memory (of type "old_heap").
还要注意的是RabbitMQ的发布 - 订阅消息负载是非常低的。 （最大为1-2条信息/秒），RabbitMQ消息会在处理完成后进行处理，所以RabbitMQ一直处于空闲状态。磁盘空间&内存也足够了。
More system info:
Limiting to approx 8092 file handles (7280 sockets)
Memory limit set to 6553MB of 16383MB total.
Disk free limit set to 50MB.
RabbitMQ日志如下。
=ERROR REPORT==== 18-Jul-2015::04:29:31 ===
** Generic server rabbit_disk_monitor terminating
** Last message in was update
** When Server state == {state,"c:/Users/jasmin.joshi/AppData/Roaming/RabbitMQ/db/[email protected]",
50000000,28358258688,100,10000,
#Ref<0.0.106.70488>,false}
** Reason for termination ==
** {eacces,[{erlang,open_port,
[{spawn,"C:\\Windows\\system32\\cmd.exe /c dir /-C /W \"c:/Users/jasmin.joshi/AppData/Roaming/RabbitMQ/db/[email protected]\""},
[stream,in,eof,hide]],
[]},
{os,cmd,1,[{file,"os.erl"},{line,204}]},
{rabbit_disk_monitor,get_disk_free,2,[]},
{rabbit_disk_monitor,internal_update,1,[]},
{rabbit_disk_monitor,handle_info,2,[]},
{gen_server,handle_msg,5,[{file,"gen_server.erl"},{line,599}]},
{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,239}]}]}
=INFO REPORT==== 18-Jul-2015::04:29:31 ===
Disabling disk free space monitoring on unsupported platform:
{{'EXIT',{eacces,[{erlang,open_port,
[{spawn,"C:\\Windows\\system32\\cmd.exe /c dir /-C /W \"c:/Users/jasmin.joshi/AppData/Roaming/RabbitMQ/db/[email protected]\""},
[stream,in,eof,hide]],
[]},
{os,cmd,1,[{file,"os.erl"},{line,204}]},
{rabbit_disk_monitor,get_disk_free,2,[]},
{rabbit_disk_monitor,init,1,[]},
{gen_server,init_it,6,[{file,"gen_server.erl"},{line,306}]},
{proc_lib,init_p_do_apply,3,
[{file,"proc_lib.erl"},{line,239}]}]}},
17179336704}
=INFO REPORT==== 18-Jul-2015::04:29:31 ===
Disabling disk free space monitoring on unsupported platform:
{{'EXIT',{eacces,[{erlang,open_port,
[{spawn,"C:\\Windows\\system32\\cmd.exe /c dir /-C /W \"c:/Users/jasmin.joshi/AppData/Roaming/RabbitMQ/db/[email protected]\""},
[stream,in,eof,hide]],
[]},
{os,cmd,1,[{file,"os.erl"},{line,204}]},
{rabbit_disk_monitor,get_disk_free,2,[]},
{rabbit_disk_monitor,init,1,[]},
{gen_server,init_it,6,[{file,"gen_server.erl"},{line,306}]},
{proc_lib,init_p_do_apply,3,
[{file,"proc_lib.erl"},{line,239}]}]}},
17179336704}
=CRASH REPORT==== 18-Jul-2015::04:29:31 ===
crasher:
initial call: rabbit_disk_monitor:init/1
pid: <0.167.0>
registered_name: rabbit_disk_monitor
exception exit: {eacces,
[{erlang,open_port,
[{spawn,
"C:\\Windows\\system32\\cmd.exe /c dir /-C /W \"c:/Users/jasmin.joshi/AppData/Roaming/RabbitMQ/db/[email protected]\""},
[stream,in,eof,hide]],
[]},
{os,cmd,1,[{file,"os.erl"},{line,204}]},
{rabbit_disk_monitor,get_disk_free,2,[]},
{rabbit_disk_monitor,internal_update,1,[]},
{rabbit_disk_monitor,handle_info,2,[]},
{gen_server,handle_msg,5,
[{file,"gen_server.erl"},{line,599}]},
{proc_lib,init_p_do_apply,3,
[{file,"proc_lib.erl"},{line,239}]}]}
in function gen_server:terminate/6 (gen_server.erl, line 746)
ancestors: [rabbit_disk_monitor_sup,rabbit_sup,<0.140.0>]
messages: []
links: [<0.166.0>]
dictionary: []
trap_exit: false
status: running
heap_size: 4185
stack_size: 27
reductions: 481081978
neighbours:
=SUPERVISOR REPORT==== 18-Jul-2015::04:29:31 ===
Supervisor: {local,rabbit_disk_monitor_sup}
Context: child_terminated
Reason: {eacces,
[{erlang,open_port,
[{spawn,
"C:\\Windows\\system32\\cmd.exe /c dir /-C /W \"c:/Users/jasmin.joshi/AppData/Roaming/RabbitMQ/db/[email protected]\""},
[stream,in,eof,hide]],
[]},
{os,cmd,1,[{file,"os.erl"},{line,204}]},
{rabbit_disk_monitor,get_disk_free,2,[]},
{rabbit_disk_monitor,internal_update,1,[]},
{rabbit_disk_monitor,handle_info,2,[]},
{gen_server,handle_msg,5,
[{file,"gen_server.erl"},{line,599}]},
{proc_lib,init_p_do_apply,3,
[{file,"proc_lib.erl"},{line,239}]}]}
Offender: [{pid,<0.167.0>},
{name,rabbit_disk_monitor},
{mfargs,{rabbit_disk_monitor,start_link,[50000000]}},
{restart_type,{transient,1}},
{shutdown,4294967295},
{child_type,worker}]
=CRASH REPORT==== 18-Jul-2015::04:29:31 ===
crasher:
initial call: rabbit_disk_monitor:init/1
pid: <0.24989.51>
registered_name: []
exception exit: unsupported_platform
in function gen_server:init_it/6 (gen_server.erl, line 322)
ancestors: [rabbit_disk_monitor_sup,rabbit_sup,<0.140.0>]
messages: []
links: [<0.166.0>]
dictionary: []
trap_exit: false
status: running
heap_size: 1598
stack_size: 27
reductions: 650
neighbours:
=SUPERVISOR REPORT==== 18-Jul-2015::04:29:31 ===
Supervisor: {local,rabbit_disk_monitor_sup}
Context: start_error
Reason: unsupported_platform
Offender: [{pid,<0.167.0>},
{name,rabbit_disk_monitor},
{mfargs,{rabbit_disk_monitor,start_link,[50000000]}},
{restart_type,{transient,1}},
{shutdown,4294967295},
{child_type,worker}]
=CRASH REPORT==== 18-Jul-2015::04:29:31 ===
crasher:
initial call: rabbit_disk_monitor:init/1
pid: <0.24991.51>
registered_name: []
exception exit: unsupported_platform
in function gen_server:init_it/6 (gen_server.erl, line 322)
ancestors: [rabbit_disk_monitor_sup,rabbit_sup,<0.140.0>]
messages: []
links: [<0.166.0>]
dictionary: []
trap_exit: false
status: running
heap_size: 1598
stack_size: 27
reductions: 650
neighbours:
=SUPERVISOR REPORT==== 18-Jul-2015::04:29:31 ===
Supervisor: {local,rabbit_disk_monitor_sup}
Context: start_error
Reason: unsupported_platform
Offender: [{pid,{restarting,<0.167.0>}},
{name,rabbit_disk_monitor},
{mfargs,{rabbit_disk_monitor,start_link,[50000000]}},
{restart_type,{transient,1}},
{shutdown,4294967295},
{child_type,worker}]
答
从错误信息，RabbitMQ的不能打开多个文件，由于系统的限制。 您可以将最大打开文件数设置为较高值以避免该问题。
https://serverfault.com/questions/249477/windows-server-2008-r2-max-open-files-limit
答
这里有两个不相关的错误：一个是虚拟机内存分配失败时。另一个是磁盘空间监视器终止。磁盘空间监视器是可选的，并且在一些不太常见的平台上或者具有特定的安全限制的情况下，已知会失败这并不会导致虚拟机停机，并且与堆分配失败无关。
堆分配失败通常归结为两种最常见的情况：
- 固定在二郎山17.x一个已知错误（不记得哪个特定的补丁发布，所以使用17.5）
- 你在64位操作系统上运行32位Erlang/OTP。
陈宇对EACCESS系统调用错误的评论是正确的。
我也面临同样的问题。任何帮助，将不胜感激 –