@Clebert Unfortunately, the business requirement is to use CoreBridges.
@Justin We tested with 1000 CoreBridges, and a memory leak remains.
Here is "the problem suspect" from the Memory Analyzer (a heap dump
analyzed):


1,254 instances of
“org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl”,
loaded by “java.net.URLClassLoader @ 0x400000000” occupy 527,112,720
(73.68%) bytes.

Biggest instances:
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x40d81e128 - 17,669,864 (2.47%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x409926c00 - 17,643,464 (2.47%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x411b0b320 - 17,624,664 (2.46%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x401fdb948 - 17,614,232 (2.46%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x4099afd28 - 17,606,640 (2.46%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x409895e10 - 17,599,608 (2.46%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x40d9e35e0 - 17,597,288 (2.46%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x409b1a978 - 17,581,512 (2.46%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x409969ad8 - 17,579,656 (2.46%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x40d9e5088 - 17,559,432 (2.45%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x410fa8d80 - 17,552,744 (2.45%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x404db4d38 - 17,547,832 (2.45%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x4197b64f0 - 17,529,272 (2.45%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x409a03058 - 17,521,432 (2.45%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x411b55168 - 17,495,208 (2.45%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x40b0b3c30 - 17,481,480 (2.44%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x4084fe4b0 - 17,478,696 (2.44%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x4195a5dc8 - 17,476,840 (2.44%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x419725708 - 17,472,008 (2.44%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x409a441c8 - 17,453,176 (2.44%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x404d89060 - 17,434,424 (2.44%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x40f875d80 - 17,425,144 (2.44%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x4102071f8 - 17,408,104 (2.43%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x40d9e34f8 - 17,383,576 (2.43%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x409926318 - 17,374,568 (2.43%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x409a7cde8 - 17,318,888 (2.42%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x40aadd150 - 17,285,208 (2.42%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x40d81ba08 - 17,273,880 (2.41%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x40070d068 - 17,223,032 (2.41%) bytes.
•org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
@ 0x41bea4538 - 17,146,936 (2.40%) bytes.

Most of these instances are referenced from one instance of
“org.apache.activemq.artemis.core.remoting.server.impl.RemotingServiceImpl”,
loaded by “java.net.URLClassLoader @ 0x400000000”, which occupies 7,008
(0.00%) bytes.

Thread
“org.apache.activemq.artemis.core.remoting.server.impl.RemotingServiceImpl$FailureCheckAndFlushThread
@ 0x405ffd540 activemq-failure-check-thread” has a local variable or
reference to
“org.apache.activemq.artemis.core.remoting.server.impl.RemotingServiceImpl
@ 0x401a42658” which is on the shortest path to
“org.apache.activemq.artemis.core.remoting.server.impl.RemotingServiceImpl
@ 0x401a42658”. The thread
org.apache.activemq.artemis.core.remoting.server.impl.RemotingServiceImpl$FailureCheckAndFlushThread
@ 0x405ffd540 activemq-failure-check-thread keeps local variables with
total size 328 (0.00%) bytes.

The stacktrace of this Thread is available. See stacktrace. See stacktrace
with involved local variables.

Keywords
org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl
java.net.URLClassLoader
org.apache.activemq.artemis.core.remoting.server.impl.RemotingServiceImpl

Thanks,
Dragan


On Tue, Nov 19, 2024 at 12:13 PM Dragan J <draga...@flipside.team> wrote:

> Hey Justin,
>
> Here are the answers:
> - Are all the bridges configured the same way? How exactly are they
> configured?
> Yes, they are configured the same way.
> The CoreBridge configuration is attached to
> https://drive.google.com/file/d/1VEwj1MoB2tbcCp8R4XeQTzi80Q0dQ606/view?usp=sharing
>
> - Is the bridge target available when you see this increase happen?
> The bridges are connected from the client side to the server (with the
> 2.38 Artemis version)
> - Are the bridges actually moving messages when you see the increase or
> are they idle?
> Most of the time, messages are idle.
> - Are 3,500 bridges actually required to trigger the increase? Do you, for
> example, not see the increase if you use 3,000 bridges? What about 1,000 or
> 100?
> We tested with 3500 CoreBridges in the development environment, and I
> should ask for permission to close some connections.
> If you require it, I would ask for that kind of permission.
>
> Thanks,
> Dragan
>
> On Mon, Nov 18, 2024 at 2:43 PM Dragan J <draga...@flipside.team> wrote:
>
>> Can you access the screenshots?
>>
>> On Thu, Nov 14, 2024 at 10:18 AM Dragan J <draga...@flipside.team> wrote:
>>
>>> Sorry, a typo. It's 3,500 CoreBridges
>>>
>>> On Thu, Nov 14, 2024 at 10:14 AM Dragan J <draga...@flipside.team>
>>> wrote:
>>>
>>>> @Justin The broker (version 2.38) communicates with other brokers
>>>> (version 2.37) through 35,000 CoreBridges. There was minimal message
>>>> exchange between them.
>>>> Please find the two graphs (from earlier) attached on my Google Drive.
>>>> Please let me know if you have an alternative way to share files.
>>>>
>>>> https://drive.google.com/file/d/1Gy8XQi153Fi5Zm9gUdsP_co8fSuh1HjL/view?usp=sharing
>>>>
>>>> https://drive.google.com/file/d/1_Fbg8OmWhlsOKfalfIEwKxGIl97a1kQ5/view?usp=sharing
>>>>
>>>> @Arthur When I tried to perform a GC from JConsole I got the following:
>>>>
>>>> Exception in thread "MemoryPanel.gc" java.lang.SecurityException: User
>>>> not authorized to access operation: gc
>>>>
>>>

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