Juan José Ramos Cassella created GEODE-5256:
-----------------------------------------------

             Summary: Default Values Override GFSH StartUp Parameters
                 Key: GEODE-5256
                 URL: https://issues.apache.org/jira/browse/GEODE-5256
             Project: Geode
          Issue Type: Bug
          Components: gfsh
            Reporter: Juan José Ramos Cassella


Hello team,

The order on which we apply the cache configuration vs the startup parameters 
when starting servers through {{gfs}} seems to be wrong.
No matter whether the cache is configured through a local {{cache.xml}} or the 
cluster configuration service, internally we end up parsing the configuration 
using {{CacheXmlParser}} and {{CacheCreation}} classes. The class 
{{CacheCreation}} creates a server through {{CacheServerCreation}} and this one 
extends {{AbstractCacheServer}}, which has some default values configured, 
overriding the values set by the startup parameters.
I've been able to reproduce this for the {{max-connections}} configuration 
property specifically, but my guess is that the bug exists for *all* cache 
properties that can be configured both through {{gfsh}} startup parameters and 
{{cache.xml}} / {{cluster.xml}} files.
As an example, after adding some extra logging on the {{setMaxConnections()}} 
method, below is the output shown when starting the server:
{noformat}
######## gfsh start server --name=server1 --server-port=40401 
--locators=localhost[10101] --max-connections=1033
[info 2018/05/25 13:55:20.752 IST server1 <main> tid=0x1] Initialization of 
region PdxTypes completed
[XXXXX]: CacheServerImpl.setMaxConnections() is changing maxConnections from 
800 to 1033.
java.lang.Throwable
        at 
org.apache.geode.internal.cache.CacheServerImpl.setMaxConnections(CacheServerImpl.java:209)
        at 
org.apache.geode.distributed.ServerLauncher.startCacheServer(ServerLauncher.java:956)
        at 
org.apache.geode.distributed.ServerLauncher.start(ServerLauncher.java:781)
        at 
org.apache.geode.distributed.ServerLauncher.run(ServerLauncher.java:692)
        at 
org.apache.geode.distributed.ServerLauncher.main(ServerLauncher.java:225)

[info 2018/05/25 13:55:20.825 IST server1 <main> tid=0x1] CacheServer 
Configuration:   port=40401 max-connections=1033 max-threads=0 
notify-by-subscription=true socket-buffer-size=32768 
maximum-time-between-pings=60000 maximum-message-count=230000 
message-time-to-live=180 eviction-policy=none capacity=1 overflow directory=. 
groups=[] loadProbe=ConnectionCountProbe loadPollInterval=5000 tcpNoDelay=true


######## gfsh -e start server --name=server1 --server-port=40401 
--locators=localhost[10101] --max-connections=1033 
--cache-xml-file=$CURRENT_DIRECTORY/server-cache.xml
[info 2018/05/25 13:56:19.593 IST server1 <main> tid=0x1] Initialization of 
region PdxTypes completed
[XXXXX]: CacheServerImpl.setMaxConnections() is changing maxConnections from 
800 to 800.
java.lang.Throwable
        at 
org.apache.geode.internal.cache.CacheServerImpl.setMaxConnections(CacheServerImpl.java:209)
        at 
org.apache.geode.internal.cache.CacheServerImpl.configureFrom(CacheServerImpl.java:304)
        at 
org.apache.geode.internal.cache.xmlcache.CacheCreation.startCacheServers(CacheCreation.java:688)
        at 
org.apache.geode.internal.cache.xmlcache.CacheCreation.create(CacheCreation.java:581)
        at 
org.apache.geode.internal.cache.xmlcache.CacheXmlParser.create(CacheXmlParser.java:337)
        at 
org.apache.geode.internal.cache.GemFireCacheImpl.loadCacheXml(GemFireCacheImpl.java:4307)
        at 
org.apache.geode.internal.cache.GemFireCacheImpl.initializeDeclarativeCache(GemFireCacheImpl.java:1434)
        at 
org.apache.geode.internal.cache.GemFireCacheImpl.initialize(GemFireCacheImpl.java:1226)
        at 
org.apache.geode.internal.cache.GemFireCacheImpl.basicCreate(GemFireCacheImpl.java:792)
        at 
org.apache.geode.internal.cache.GemFireCacheImpl.create(GemFireCacheImpl.java:778)
        at org.apache.geode.cache.CacheFactory.create(CacheFactory.java:177)
        at org.apache.geode.cache.CacheFactory.create(CacheFactory.java:224)
        at 
org.apache.geode.distributed.internal.DefaultServerLauncherCacheProvider.createCache(DefaultServerLauncherCacheProvider.java:52)
        at 
org.apache.geode.distributed.ServerLauncher.createCache(ServerLauncher.java:844)
        at 
org.apache.geode.distributed.ServerLauncher.start(ServerLauncher.java:762)
        at 
org.apache.geode.distributed.ServerLauncher.run(ServerLauncher.java:692)
        at 
org.apache.geode.distributed.ServerLauncher.main(ServerLauncher.java:225)

[info 2018/05/25 13:56:19.929 IST server1 <main> tid=0x1] CacheServer 
Configuration:   port=40401 max-connections=800 max-threads=0 
notify-by-subscription=true socket-buffer-size=32768 
maximum-time-between-pings=60000 maximum-message-count=230000 
message-time-to-live=180 eviction-policy=none capacity=1 overflow directory=. 
groups=[] loadProbe=ConnectionCountProbe loadPollInterval=5000 tcpNoDelay=true
{noformat}

A reproducible scenario is attached to the JIRA.
Cheers.



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