[rabbitmq-discuss] Consumer - threw an exception for channel AMQChannel

Sun Mar 13 11:46:07 GMT 2011

I am running this test program from within eclipse. My eclipse.ini
file has below properties.
-startup
plugins/org.eclipse.equinox.launcher_1.1.0.v20100507.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.0.v20100503
-product
org.eclipse.epp.package.java.product
--launcher.defaultAction
openFile
--launcher.XXMaxPermSize
256M
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
256m
--launcher.defaultAction
openFile
-vm
C:/programs/java/jdk1.6.0_012/bin
-vmargs
-Dosgi.requiredJavaVersion=1.5
-Xms512m
-Xmx1024m

I believe problem is coming because in while loop I am converting the
byte[] into string using new String(byte[]).
Below line of code is the cause:
msgContent=new String(delivery.getBody());

GC does tries to free up memory, still I think it doesn't take care of
string objects sitting in heap as soon as they are not needed. While
loop is running @ full throttle.
Here is memory (Runtime.getRuntime().freeMemory()) pattern on receipt
of each msg:
Intial Memory 4831168
0 : Memory = 4300664
1 : Memory = 12289864
2 : Memory = 12289912
3 : Memory = 15001624
4 : Memory = 12289528
5 : Memory = 14513344
6 : Memory = 14513120
7 : Memory = 13986864
8 : Memory = 14382256
9 : Memory = 13986760
10 : Memory = 16178360
11 : Memory = 16178336
12 : Memory = 16440544
13 : Memory = 16309256
14 : Memory = 16569344
15 : Memory = 17710224
16 : Memory = 16571624
17 : Memory = 13634552
18 : Memory = 13958824
19 : Memory = 16146296
20 : Memory = 17551288
21 : Memory = 14966368
22 : Memory = 17026856
23 : Memory = 14966496
24 : Memory = 15320384
25 : Memory = 16183312
26 : Memory = 16359344
27 : Memory = 20692472
28 : Memory = 23010888
29 : Memory = 21177504
30 : Memory = 21222064
31 : Memory = 22916800
32 : Memory = 22916624
33 : Memory = 25201640
34 : Memory = 28177344
35 : Memory = 29973712
36 : Memory = 28923024
37 : Memory = 26630152
38 : Memory = 26850696
39 : Memory = 29737008
40 : Memory = 30523536
41 : Memory = 27552984
42 : Memory = 31575736
43 : Memory = 29255120
44 : Memory = 29977904
45 : Memory = 28688760
46 : Memory = 30220600
47 : Memory = 32055928
48 : Memory = 31662688
49 : Memory = 27281776
50 : Memory = 32715880
51 : Memory = 31796376
52 : Memory = 29213632
53 : Memory = 26370440
54 : Memory = 26370112
55 : Memory = 31009408
56 : Memory = 31929120
57 : Memory = 28557568
58 : Memory = 29215280
59 : Memory = 29215360
60 : Memory = 31402672
61 : Memory = 23395400
62 : Memory = 26461160
63 : Memory = 29963944
64 : Memory = 30881736
65 : Memory = 26107536
66 : Memory = 28036680
67 : Memory = 27117232
68 : Memory = 26371872
69 : Memory = 26371648
70 : Memory = 27903384
71 : Memory = 30095208
72 : Memory = 26369784
73 : Memory = 23526928
74 : Memory = 25320624
75 : Memory = 25583208
76 : Memory = 24274456
77 : Memory = 19631280
78 : Memory = 24536536
79 : Memory = 26986152
80 : Memory = 26594952
81 : Memory = 20682104
82 : Memory = 17836880
83 : Memory = 20682152
84 : Memory = 20682176
85 : Memory = 17836736
86 : Memory = 17836680
87 : Memory = 18060384
88 : Memory = 17706216
89 : Memory = 14336712
90 : Memory = 14467672
91 : Memory = 9302712
92 : Memory = 6459032
93 : Memory = 8777240
94 : Memory = 5633480
95 : Memory = 8517688
96 : Memory = 7337728
97 : Memory = 7337984

Please advice.

Thanks,
Rishi

On Mar 11, 9:30 pm, Rob Harrop <r... at rabbitmq.com> wrote:
> What heap size do you have configured for your JVM? It's is entirely
> possible that if you're using the default sizes that 16 3MB msgs will
> cause you to start hitting the OOM exception.
>
> Regards,
>
> Rob
>
> On 11/03/11 16:02, RishiDev wrote:
>
> > Hi,
>
> > I have about 10K large msgs (each ~3 MB) in a queue. Started running a
> > java consumer client on the queue and after receiving 16 msgs I got
> > following exception. Please help resolve/understand the issue.
>
> > Consumer com.rabbitmq.client.QueueingConsumer at 15b9e68 (amq.ctag-bEjkq
> > +5EqqmXsp1idK9rrg==) method handleDelivery for channel
> > AMQChannel(amqp://guest@localhost:5672/,1) threw an exception for
> > channel AMQChannel(amqp://guest@localhost:5672/,1):
> > java.lang.OutOfMemoryError
> > com.rabbitmq.client.AlreadyClosedException: clean connection shutdown;
> > reason: Attempt to use closed channel
> >    at com.rabbitmq.client.impl.AMQChannel.ensureIsOpen(AMQChannel.java:
> > 195)
> >    at com.rabbitmq.client.impl.AMQChannel.transmit(AMQChannel.java:290)
> >    at com.rabbitmq.client.impl.AMQChannel.transmit(AMQChannel.java:284)
> >    at com.rabbitmq.client.impl.ChannelN.basicAck(ChannelN.java:669)
> >    at
> > com.octanner.jmspoc.rabbitmq.RabbitMQConsumer.receiveMsgs(RabbitMQConsumer.java:
> > 69)
> >    at
> > com.octanner.jmspoc.rabbitmq.RabbitMQConsumer.main(RabbitMQConsumer.java:
> > 77)
> > Exception in thread "main"
>
> > Thanks,
> > Rishi
> > _______________________________________________
> > rabbitmq-discuss mailing list
> > rabbitmq-disc... at lists.rabbitmq.com
> >https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss
>
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