The confluence server (v6.5.1) was deploy on the test environment then I migrated data from our productive confluence (v.5.9.11) to test.
After starting confluence on test, I see next trouble «Confluence failed to start, but now it works again» (on screen).
Our prod Confluence work excellent.

- Confluence (prod/test) work on Linux.
- We use MySQL database.
Confluence logs:
2018-01-09 10:22:19,554 WARN [http-nio-8090-exec-6] [confluence.impl.hibernate.ConfluenceHibernateTransactionManager] doRollback Performing rollback. Transactions:
->[null]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (Session #585753841)
-- traceId: c7fc290beb95a53f
2018-01-09 10:22:19,598 WARN [http-nio-8090-exec-6] [confluence.util.profiling.ConfluenceSitemeshDecorator] render TransactionException prevented transaction from committing whilst rendering the decorator, the cause is likely a previously logged exception: Transaction rolled back because it has been marked as rollback-only
Cause :
-- traceId: c7fc290beb95a53f
2018-01-09 10:22:35,418 ERROR [http-nio-8090-exec-1] [ContainerBase.[Standalone].[localhost].[/]] log Unhandled exception occurred whilst decorating page
-- referer: http://mjiratest.bops.local:8090/ | url: /johnson/data | traceId: 52b59c64b6fa6e97 | userName: anonymous
java.lang.NullPointerException
2018-01-09 10:22:35,418 ERROR [http-nio-8090-exec-7] [ContainerBase.[Standalone].[localhost].[/]] log Unhandled exception occurred whilst decorating page
-- referer: http://10.64.64.155:8090/ | url: /johnson/data | traceId: 25ee737182ee0db3 | userName: anonymous
java.lang.NullPointerException
2018-01-09 10:22:35,421 ERROR [http-nio-8090-exec-1] [[Standalone].[localhost].[/].[johnson-data-servlet]] log Servlet.service() for servlet [johnson-data-servlet] in context with path [] threw exception
java.lang.NullPointerException
2018-01-09 10:22:35,422 ERROR [http-nio-8090-exec-7] [[Standalone].[localhost].[/].[johnson-data-servlet]] log Servlet.service() for servlet [johnson-data-servlet] in context with path [] threw exception
java.lang.NullPointerException
2018-01-09 10:22:35,424 INFO [http-nio-8090-exec-7] [atlassian.confluence.status.SystemErrorInformationLogger] writeToLog
Request Unique ID : 6afa7814-1206-4c5b-b10e-f03142842647
--------------------------
JVM Stats
--------------------------
usedMemory = 777778288
usedMemoryInMegabytes = 741
availableHeap = 295963536
freeMemoryInMegabytes = 282
allocatedHeap = 1073741824
freeAllocatedHeap = 295963536
totalMemory = 1073741824
totalMemoryInMegabytes = 1024
availablePermGen = 0
maxPermGen = -1
maxHeap = 1073741824
usedHeap = 777778288
freeMemory = 295963536
usedPermGen = -1
--------------------------
Request Information
--------------------------
URL: http://10.64.64.155:8090/500page.jsp
Scheme: http
Server: 10.64.64.155
Port: 8090
URI: /500page.jsp
Context Path:
Servlet Path: /500page.jsp
Path Info: null
Query String: null
--------------------------
Attributes
--------------------------
javax.servlet.forward.request_uri: /johnson/data
javax.servlet.forward.context_path:
javax.servlet.forward.servlet_path: /johnson/data
javax.servlet.error.status_code: 500
com.atlassian.confluence.impl.profiling.DecoratorTimings: com.atlassian.confluence.impl.profiling.DecoratorTimings@7336f108
com.opensymphony.sitemesh.APPLIED_ONCE: true
__cleanup_recursion_counter: 0
javax.servlet.error.message:
javax.servlet.error.servlet_name: johnson-data-servlet
com.atlassian.confluence.web.filter.validateparam.RequestParamValidationFilter_already_filtered: true
atlassian.core.seraph.original.url: /500page.jsp
com.atlassian.labs.botkiller.BotKillerFilter: true
com.atlassian.gzipfilter.GzipFilter_already_filtered: true
B3-TraceId: 9f8eb87881d5aa
loginfilter.already.filtered: true
javax.servlet.error.request_uri: /johnson/data
com.atlassian.core.filters.HeaderSanitisingFilter_already_filtered: true
com.atlassian.prettyurls.filter.PrettyUrlsSiteMeshFixupFilter: true
javax.servlet.error.exception: java.lang.NullPointerException
os_securityfilter_already_filtered: true
com.atlassian.prettyurls.filter.PrettyUrlsSiteMeshFilter: true
--------------------------
Parameters
--------------------------
caused by: java.lang.NullPointerException
at Unknown location
2018-01-09 10:22:35,424 INFO [http-nio-8090-exec-1] [atlassian.confluence.status.SystemErrorInformationLogger] writeToLog
Request Unique ID : a91d6edf-52b1-41dc-b2df-eab94811c54d