Showing results for 
Search instead for 
Did you mean: 
Sign up Log in

Next challenges

Recent achievements

  • Global
  • Personal


  • Give kudos
  • Received
  • Given


  • Global

Trophy case

Kudos (beta program)

Kudos logo

You've been invited into the Kudos (beta program) private group. Chat with others in the program, or give feedback to Atlassian.

View group

It's not the same without you

Join the community to find out what other Atlassian users are discussing, debating and creating.

Atlassian Community Hero Image Collage

Confluence gives an error when try to connect to local MySQL database


Confluence can't start due an error connection to MySQL database. Confluence is 7.4.3 and MySQL is 8.0.17.

In logs I have these errors:

2020-08-10 09:57:39,248 WARN [C3P0PooledConnectionPoolManager[identityToken->2rvyoeab1nr4lpk13s5jzv|62bd05a9]-HelperThread-#2] [mchange.v2.resourcepool.BasicResourcePool] log Having failed to acquire a resource, com.mchange.v2.resourcepool.BasicResourcePool@77330e3c is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests.
2020-08-10 09:57:39,249 WARN [C3P0PooledConnectionPoolManager[identityToken->2rvyoeab1nr4lpk13s5jzv|62bd05a9]-HelperThread-#0] [mchange.v2.resourcepool.BasicResourcePool] log com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@6268a52 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception:
java.sql.SQLException: The server time zone value 'CEST' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.


This one is in catalina.out file:

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See for further details.
10-Aug-2020 09:51:37.428 INFORMACI▒~SN [Catalina-utility-2] org.apache.catalina.core.ApplicationContext.log 1 Spring WebApplicationInitializers detected on classpath
10-Aug-2020 09:51:37.905 INFORMACI▒~SN [Catalina-utility-2] org.apache.catalina.core.ApplicationContext.log Initializing Spring DispatcherServlet 'dispatcher'
2020-08-10 09:51:39,014 INFO [Catalina-utility-1] [com.atlassian.confluence.lifecycle] contextInitialized Starting Confluence 7.4.3 [build 8401 based on commit hash 1eaa024f06dac58f149033b1fed7ed2ee21ec52c] - synchrony version 3.1.0-master-022ca438
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.atlassian.hibernate.adapter.proxy.BytecodeProviderImpl_ImplementV2Proxy (file:/opt/atlassian/confluence/confluence/WEB-INF/lib/hibernate.adapter-1.0.3.jar) to field java.lang.reflect.Field.modifiers
WARNING: Please consider reporting this to the maintainers of com.atlassian.hibernate.adapter.proxy.BytecodeProviderImpl_ImplementV2Proxy
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release


I am using mysql-connector-java-8.0.17.jar driver to connect to MySQL.

Can anyone help me?


1 answer

0 votes
Rick Li Atlassian Team Oct 19, 2020

Welcome to community.

Just googled to get to this page.

Though I could not find thee answer for my issue here,

this problem seems similar to existing bug:

Suggest an answer

Log in or Sign up to answer
Community showcase
Published in Confluence

Announcing Team Calendars in Confluence Data Center

Hi Community! We're thrilled to share that Team Calendars for Confluence is now a built-in feature for Confluence Data Center releases 7.11 and beyond.  A long time favorite,  Team Cale...

146 views 0 5
Read article

Community Events

Connect with like-minded Atlassian users at free events near you!

Find an event

Connect with like-minded Atlassian users at free events near you!

Unfortunately there are no Community Events near you at the moment.

Host an event

You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events

Events near you