I'm now using the version 6.10.0: but I can not check anymore which was the previous one (I followed the whole Alvaro's tutorial, except for MariaDB which I did not change).

Le 05/04/2020 à 15:35, Maxim Solodovnik a écrit :
what version of KMS are you using?

On Sun, 5 Apr 2020 at 20:30, Xavier M <[email protected] <mailto:[email protected]>> wrote:

    For information : the same happened to me with OM-5.0.0-M1: no
    connexion was established with the Media Server anymore after a
    restart of my server due to another reason.

    This was the reason why I installed M3 (and installed KMS again),
    such as the very beginning of my last topic:
    
https://markmail.org/message/zjzm5kcx4rch4eml?q=Installation+of+OpenMeetings+5%2E0%2E0-M3+fails+-+database+connexion&page=1


    Xavier


    Le 05/04/2020 à 03:42, Maxim Solodovnik a écrit :
    I would say it is weird
    All "occupied" resources are at minimum level after restart
    Can you do multiple restarts and check if this issue is reproducible?

    BTW what version of KMS are you using?

    On Sun, 5 Apr 2020 at 01:20, Marcus Schulz <[email protected]
    <mailto:[email protected]>> wrote:

        HI,

        for the kurento user it looks like this:

        su  kurento -c "ulimit -a "
        time(seconds)        unlimited
        file(blocks)         unlimited
        data(kbytes)         unlimited
        stack(kbytes)        8192
        coredump(blocks)     0
        memory(kbytes)       unlimited
        locked memory(kbytes) 16384
        process              62987
        nofiles              10240
        vmemory(kbytes)      unlimited
        locks                unlimited
        rtprio               0


        Am Samstag, den 04.04.2020, 21:15 +0700 schrieb Maxim Solodovnik:
        these limits are for currently logged in user
        what user is used for KMS

        according to the script, it seems there is a bug :(

        On Sat, 4 Apr 2020 at 15:56, Marcus Schulz
        <[email protected] <mailto:[email protected]>> wrote:
        Hi,

        I run OpenMeetings M3 on a Ubuntu 18 Server wor two weeks
        without problems.
        Yesterday I did a reboot and openmeetings fails to connect
        to the media server. It seems to be a problem with resource
        limits.
        I can't remember I changed anything.
        That's in the log of kurento after restart:

        2020-04-04T10:39:48,750739 16613 0x00007fea7703e280   error
        KurentoWebSocketTransport WebSocketTransport.cpp:130
        WebSocketTransport()  Error starting listen for websocket
        transport on port 8888: Underlying Transport Error

        netstat says:
        tcp6      13      0
        [::]:8888               [::]:*                  LISTEN

        Openmeeting tries to establish a connection wit a new
        channel, but failed:

        34mINFO ESC[0;39m 04-04 10:36:22.014
        ESC[36mo.k.j.c.JsonRpcClientNettyWebSocket:234
        [ntLoopGroup-2-1]ESC[0;39m - [KurentoClient]  Initiating
        new Netty channel. Will create new handler too!
        ESC[31mWARN ESC[0;39m 04-04 10:36:46.655
        ESC[36mo.a.o.c.r.KurentoHandler:124 [main]ESC[0;39m - Fail
        to create Kurento client, will re-try in 10000 ms
        ESC[31mWARN ESC[0;39m 04-04 10:36:46.664
        ESC[36mo.k.j.c.JsonRpcClientNettyWebSocket:257
        [rbeatExec-e1-t0]ESC[0;39m - [KurentoClient]  ERROR
        connecting WS Netty client, opening channel
        java.lang.InterruptedException: null
                at java.base/java.lang.Object.wait(Native Method)
                at java.base/java.lang.Object.wait(Object.java:328)
                at
        io.netty.util.concurrent.DefaultPromise.await(DefaultPromise.java:221)
                at
        
io.netty.channel.DefaultChannelPromise.await(DefaultChannelPromise.java:131)
                at
        
io.netty.channel.DefaultChannelPromise.await(DefaultChannelPromise.java:30)
                at
        io.netty.util.concurrent.DefaultPromise.sync(DefaultPromise.java:328)
                at
        
io.netty.channel.DefaultChannelPromise.sync(DefaultChannelPromise.java:119)
                at
        
io.netty.channel.DefaultChannelPromise.sync(DefaultChannelPromise.java:30)
                at
        
org.kurento.jsonrpc.client.JsonRpcClientNettyWebSocket.connectNativeClient(JsonRpcClientNettyWebSocket.java:254)
                at
        
org.kurento.jsonrpc.client.AbstractJsonRpcClientWebSocket.internalConnectIfNecessary(AbstractJsonRpcClientWebSocket.java:711)
                at
        
org.kurento.jsonrpc.client.AbstractJsonRpcClientWebSocket.connectIfNecessary(AbstractJsonRpcClientWebSocket.java:847)
                at
        
org.kurento.jsonrpc.client.AbstractJsonRpcClientWebSocket.internalSendRequestWebSocket(AbstractJsonRpcClientWebSocket.java:352)
                at
        
org.kurento.jsonrpc.client.AbstractJsonRpcClientWebSocket$1.internalSendRequest(AbstractJsonRpcClientWebSocket.java:141)
                at
        
org.kurento.jsonrpc.internal.JsonRpcRequestSenderHelper.sendRequest(JsonRpcRequestSenderHelper.java:75)
                at
        
org.kurento.jsonrpc.internal.JsonRpcRequestSenderHelper.sendRequest(JsonRpcRequestSenderHelper.java:69)
                at
        
org.kurento.jsonrpc.internal.JsonRpcRequestSenderHelper.sendRequest(JsonRpcRequestSenderHelper.java:99)
                at
        
org.kurento.jsonrpc.client.JsonRpcClient.sendRequest(JsonRpcClient.java:122)
                at
        org.kurento.jsonrpc.client.JsonRpcClient$1.run(JsonRpcClient.java:262)
                at
        
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
                at
        
java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
                at
        
java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
                at
        
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
                at
        
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
                at java.base/java.lang.Thread.run(Thread.java:834)
        04-Apr-2020 10:36:46.739 INFORMATION [main]
        com.hazelcast.internal.partition.impl.PartitionStateManager.null
        [85.214.114.57]:5701 [dev] [3.12.2] Initializing cluster
        partition table arrangement...
        ESC[34mINFO ESC[0;39m 04-04 10:36:46.752
        ESC[36mo.k.j.c.JsonRpcClientNettyWebSocket:234
        [ntLoopGroup-2-2]ESC[0;39m - [KurentoClient]  Initiating
        new Netty channel. Will create new handler too!

        Sometimes it says there is an outof memory / resource
        limitation and it's not able to open a new thread.

        So I checked:

        root@xxxx:/opt/open503/logs# ulimit -a
        core file size          (blocks, -c) 0
        data seg size           (kbytes, -d) unlimited
        scheduling priority             (-e) 0
        file size               (blocks, -f) unlimited
        pending signals                 (-i) 1546410
        max locked memory       (kbytes, -l) 16384
        max memory size         (kbytes, -m) unlimited
        open files                      (-n) 1024
        pipe size            (512 bytes, -p) 8
        POSIX message queues     (bytes, -q) 819200
        real-time priority              (-r) 0
        stack size              (kbytes, -s) 8192
        cpu time               (seconds, -t) unlimited
        max user processes              (-u) 62987
        virtual memory          (kbytes, -v) unlimited
        file locks                      (-x) unlimited

        Any ideas for further checks what's wrong?

        What kind of limits do you suggest in
        /etc/security/limits.conf ?

        Btw, I used the tomcat3 init script Alvaro used in the
        tutorial. Just saw the tomcat is still running as root,
        even if it should run as nobody.
        Maybe that's a problem also.

        Kind regards

        Marcus








-- Best regards,
    Maxim



--
Best regards,
Maxim

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