Just to let you know about the epilogue. It was just an accidentally 
turned-on System alert with an empty string. Upon turning it off, 
everything seems ok. A suggestion to the developers: Prohibit empty status 
strings for system-wide alerts to prevent such behavior.

Regards
Milos

среда, 18. октобар 2023. у 13:33:59 UTC+2 Milos Ivanovic је написао/ла:

> Many thanks, @Leandro, I will give it a try. 
>
> Kind regards
> Milos
>
> уторак, 17. октобар 2023. у 15:14:05 UTC+2 Leandro Pereira је написао/ла:
>
>> [2023-10-17 02:39:28] [info] Exception in thread 
>> "http-nio-0.0.0.0-8080-Poller" java.lang.OutOfMemoryError: unable to create 
>> native thread: *possibly out of memory or process/resource limits 
>> reached*
>>
>> Maybe this post reseolve the problem:
>>
>> https://stackoverflow.com/questions/72477454/java-lang-outofmemoryerror-unable-to-create-native-thread-possibly-out-of-mem
>>
>> Em terça-feira, 17 de outubro de 2023 às 09:06:14 UTC-3, Milos Ivanovic 
>> escreveu:
>>
>>> The appearance of this box may have to do something with another 
>>> problem. Every few days DSpace backend just stops, with the following 
>>> output:
>>>
>>> *$ tail catalina.out*
>>> [2023-10-17 02:35:05] [info] [546663.224s][warning][os,thread] Failed to 
>>> start the native thread for java.lang.Thread "Connection evictor"
>>> [2023-10-17 02:35:30] [info] [546688.070s][warning][os,thread] Failed to 
>>> start thread "Unknown thread" - pthread_create failed (EAGAIN) for 
>>> attributes: stacksize: 1024k, guardsize: 0k, detached.
>>> [2023-10-17 02:35:30] [info] [546688.071s][warning][os,thread] Failed to 
>>> start thread "Unknown thread" - pthread_create failed (EAGAIN) for 
>>> attributes: stacksize: 1024k, guardsize: 0k, detached.
>>> [2023-10-17 02:35:30] [info] [546688.072s][warning][os,thread] Failed to 
>>> start the native thread for java.lang.Thread "Connection evictor"
>>> [2023-10-17 02:35:30] [info] [546688.072s][warning][os,thread] Failed to 
>>> start thread "Unknown thread" - pthread_create failed (EAGAIN) for 
>>> attributes: stacksize: 1024k, guardsize: 0k, detached.
>>> [2023-10-17 02:35:30] [info] [546688.072s][warning][os,thread] Failed to 
>>> start the native thread for java.lang.Thread "Connection evictor"
>>> [2023-10-17 02:35:30] [info] [546688.073s][warning][os,thread] Failed to 
>>> start the native thread for java.lang.Thread "Connection evictor"
>>> [2023-10-17 02:35:32] [info] [546690.312s][warning][os,thread] Failed to 
>>> start thread "Unknown thread" - pthread_create failed (EAGAIN) for 
>>> attributes: stacksize: 1024k, guardsize: 0k, detached.
>>> [2023-10-17 02:35:32] [info] [546690.313s][warning][os,thread] Failed to 
>>> start the native thread for java.lang.Thread "Connection evictor"
>>> [2023-10-17 02:35:32] [info] [546690.314s][warning][os,thread] Failed to 
>>> start thread "Unknown thread" - pthread_create failed (EAGAIN) for 
>>> attributes: stacksize: 1024k, guardsize: 0k, detached.
>>> [2023-10-17 02:35:32] [info] [546690.314s][warning][os,thread] Failed to 
>>> start the native thread for java.lang.Thread "Connection evictor"
>>> [2023-10-17 02:35:32] [info] [546690.315s][warning][os,thread] Failed to 
>>> start thread "Unknown thread" - pthread_create failed (EAGAIN) for 
>>> attributes: stacksize: 1024k, guardsize: 0k, detached.
>>> [2023-10-17 02:39:28] [info] [546926.143s][warning][os,thread] Failed to 
>>> start the native thread for java.lang.Thread 
>>> "http-nio-0.0.0.0-8080-exec-499"
>>> [2023-10-17 02:39:28] [info] Exception in thread 
>>> "http-nio-0.0.0.0-8080-Poller" java.lang.OutOfMemoryError: unable to create 
>>> native thread: possibly out of memory or process/resource limits reached
>>> [2023-10-17 02:39:28] [info] #011at 
>>> java.base/java.lang.Thread.start0(Native Method)
>>> [2023-10-17 02:39:28] [info] #011at 
>>> java.base/java.lang.Thread.start(Thread.java:798)
>>> [2023-10-17 02:39:28] [info] #011at 
>>> org.apache.tomcat.util.threads.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:984)
>>> [2023-10-17 02:39:28] [info] #011at 
>>> org.apache.tomcat.util.threads.ThreadPoolExecutor.executeInternal(ThreadPoolExecutor.java:1480)
>>> [2023-10-17 02:39:28] [info] #011at 
>>> org.apache.tomcat.util.threads.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1402)
>>> [2023-10-17 02:39:28] [info] #011at 
>>> org.apache.tomcat.util.threads.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1376)
>>> [2023-10-17 02:39:28] [info] #011at 
>>> org.apache.tomcat.util.net.AbstractEndpoint.processSocket(AbstractEndpoint.java:1174)
>>> [2023-10-17 02:39:28] [info] #011at 
>>> org.apache.tomcat.util.net.NioEndpoint$Poller.processKey(NioEndpoint.java:867)
>>> [2023-10-17 02:39:28] [info] #011at 
>>> org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.java:834)
>>> [2023-10-17 02:39:28] [info] #011at 
>>> java.base/java.lang.Thread.run(Thread.java:829)
>>>
>>>
>>> The server has 24GB RAM, so it cannot be a problem. Ther health status 
>>> reported by DSpace is okay, as well as the *dspace.log* output. Any 
>>> idea where to look?
>>>
>>> Thanks in advance,
>>> Milos
>>>
>>>
>>> недеља, 15. октобар 2023. у 10:04:21 UTC+2 Milos Ivanovic је написао/ла:
>>>
>>>> Thanks @leandro for your quick reply. Unfortunately, this is something 
>>>> different. The table *systemwidealert* is empty :(
>>>>
>>>>
>>>> недеља, 15. октобар 2023. у 04:44:21 UTC+2 Leandro Pereira је 
>>>> написао/ла:
>>>>
>>>>> Hi
>>>>>
>>>>> had the same problem. It normally happens when the system maintenance 
>>>>> button is active. However in the version, some bug prevents deactivation, 
>>>>> not yet resolved.
>>>>>
>>>>> Wu solved the same problem by deleting the alert from the database.
>>>>>
>>>>> ~# psql dspace
>>>>> psql (14.9)
>>>>> Type "help" for help.
>>>>>
>>>>> dspace=# delete from systemwidealert;
>>>>>
>>>>> Em sexta-feira, 13 de outubro de 2023 às 15:45:57 UTC-3, Milos 
>>>>> Ivanovic escreveu:
>>>>>
>>>>>> Dear All,
>>>>>>
>>>>>> I use the 7.6 release and everything works well so far. However, last 
>>>>>> week, upon the server restart, the thin horizontal box appeared out of 
>>>>>> nowhere, just above the whole frame. It looks like an empty alert box 
>>>>>> (image provided). What can it be and how to remove it?
>>>>>>
>>>>>> Something like this in HTML:
>>>>>>
>>>>>> <div _ngcontent-dspace-angular-c211="" class="ng-star-inserted"><div 
>>>>>> _ngcontent-dspace-angular-c211="" class="rounded-0 alert alert-warning 
>>>>>> w100"><div _ngcontent-dspace-angular-c211="" class="container"><span 
>>>>>> _ngcontent-dspace-angular-c211="" class="font-weight-bold"><!--bindings={
>>>>>>   "ng-reflect-ng-if": "false"
>>>>>> }--><!--bindings={
>>>>>>   "ng-reflect-ng-if": "false"
>>>>>> }--><!--bindings={
>>>>>>   "ng-reflect-ng-if": "false"
>>>>>> }--><!--bindings={
>>>>>>   "ng-reflect-ng-if": "false"
>>>>>> }--></span><span 
>>>>>> _ngcontent-dspace-angular-c211=""></span></div></div></div>
>>>>>>
>>>>>> Thanks in advance,
>>>>>> Milos
>>>>>>
>>>>>>

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