I had this same question a while back.  I finally found the system 
requirements at: 
https://wiki.lyrasis.org/display/DSDOC7x/Performance+Tuning+DSpace.

Our system, which has quite a bit of stuff but not a lot of traffic has 
12GB of RAM + a 4GB swap space.


On Friday, June 28, 2024 at 10:31:26 AM UTC-4 Tukur Sulaiman wrote:

> I 'm having trouble installing DSpace Server with my system which is 
> having 120GB with 2GB of RAM. The system just stopped after installing  
> openjdk version 17.0.11 and apache tomcat 9.0. Please, what are the 
> requirements to build a dspace server? 
> thank you 
>
> On Thu, Jun 27, 2024 at 2:42 PM Tukur Sulaiman <tukurs...@gmail.com> 
> wrote:
>
>>
>>
>> On Thu, Jun 27, 2024 at 7:20 AM Andrea Silvestri <andrea.s...@unitn.it> 
>> wrote:
>>
> Hi Tim,
>>>
>>> thank for your answer. I saw this github issue, but I have my solr up 
>>> and running.
>>> I can also connect to the Solr Admin UI and see it's running; maybe it's 
>>> not configured correctly, I'll check it.
>>>
>>> With the recently release of DSpace 8.0 I'm trying to do a clean install 
>>> of the latest release.
>>>
>>> Thanks again,
>>> Andrea
>>>
>>> Il giorno martedì 25 giugno 2024 alle 22:42:03 UTC+2 DSpace Technical 
>>> Support ha scritto:
>>>
>>>> Hi Andrea,
>>>>
>>>> The error you described sounds like it might be this one: 
>>>> https://github.com/DSpace/DSpace/issues/9217
>>>>
>>>> Simply put, in 7.6.1 (and some earlier versions of 7.x), you'd see 
>>>> these strange errors if you attempted to startup the DSpace backend 
>>>> (server 
>>>> webapp) while Solr was *down* (or unavailable/unresponsive).  The 
>>>> fix/workaround was to simply start Solr *before* the DSpace backend.
>>>>
>>>> As of 8.0 (and the upcoming 7.6.2) release, we have fixed this issue 
>>>> and the DSpace backend can now start successfully even if Solr is 
>>>> unavailable.
>>>>
>>>> Tim
>>>> On Monday, June 17, 2024 at 9:21:32 AM UTC-5 andrea.s...@unitn.it 
>>>> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> I'm having trouble installing DSpace 7.6.1.
>>>>> When I start Tomcat "server" the web application deployment gives many 
>>>>> errors starting from an "Error starting child".
>>>>> I have:
>>>>> - Ubuntu 22.04
>>>>> - Tomcat 9.0.58.0
>>>>> - Apache 2.4.52
>>>>> - Openjdk version "17.0.11"
>>>>> - Maven 3.6.3
>>>>> - Ant(TM) version 1.10.12
>>>>>
>>>>> I can see many exceptions in tomcat logs and configuring DSpace logs 
>>>>> with level "DEBUG" I can see these errors:
>>>>> 1) ERROR unknown unknown org.dspace.statistics.SolrLoggerServiceImpl @ 
>>>>> java.lang.IllegalStateException: The required 'dbfile' configuration is 
>>>>> missing in usage-statistics.cfg!
>>>>> (I found this issue was fixed in version 7.5 but I have it with 7.6.1 
>>>>> version)
>>>>>
>>>>> 2) ERROR unknown unknown org.springframework.boot.SpringApplication @ 
>>>>> Application run failed
>>>>> And after this error I can see many exceptions like this: 
>>>>> org.springframework.beans.factory.UnsatisfiedDependencyException: 
>>>>> Error creating bean with name 'authenticationRestController': Unsatisfied 
>>>>> dependency expressed through field 'converter'; nested exception is 
>>>>> org.springframework.beans.factory.UnsatisfiedDependencyException: Error 
>>>>> creating bean with name 'converterService': Unsatisfied dependency 
>>>>> expressed through field 'converters'; nested exception is 
>>>>> org.springframework.beans.factory.BeanCreationException: Error creating 
>>>>> bean with name 'workflowItemConverter' defined in file 
>>>>> [/opt/dspace-7/webapps/server/WEB-INF/classes/org/dspace/app/rest/converter/WorkflowItemConverter.class]:
>>>>>  
>>>>> Instantiation of bean failed; nested exception is 
>>>>> org.springframework.beans.BeanInstantiationException: Failed to 
>>>>> instantiate 
>>>>> [org.dspace.app.rest.converter.WorkflowItemConverter]: Constructor threw 
>>>>> exception; nested exception is java.lang.NullPointerException: Cannot 
>>>>> invoke 
>>>>> "org.dspace.submit.factory.SubmissionServiceFactory.getSubmissionConfigService()"
>>>>>  
>>>>> because the return value of 
>>>>> "org.dspace.submit.factory.SubmissionServiceFactory.getInstance()" is null
>>>>>
>>>>> These exceptions are all related to "SubmissionServiceFactory" and 
>>>>> functions returning null: getSubmissionConfigService, getInstance, etc.)
>>>>>
>>>>> I have followed the wiki's instructions but cannot have the server 
>>>>> deployment working.
>>>>>
>>>>> Best regards,
>>>>> Andrea
>>>>>
>>>>>
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>>>
>>

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