Hi Simon, thanks for your hints! I followed them and received a lot of messages but actually I'm no java developer. I tried to reduce the log output by leaving out the "at"-lines but it is still large. Hope that no one gets annoyed too much: 2022-08-02 09:56:00,022 [DefaultQuartzScheduler_Worker-18] WARN org.hibernate.orm.deprecation - HHH90000022: Hibernate's legacy org.hibernate.Criteria API is deprecated; use the JPA javax.persistence.criteria.CriteriaQuery instead 2022-08-02 09:56:02,718 [DefaultQuartzScheduler_Worker-1] WARN org.hibernate.orm.deprecation - HHH020100: The Ehcache second-level cache provider for Hibernate is deprecated. See https://hibernate.atlassian.net/browse/HHH-12441 for details. 2022-08-02 09:56:33,348 [C3P0PooledConnectionPoolManager[identityToken->z8kfluaqp0t6ro20pjuq|3ff5aba ]-HelperThread-#0] WARN com.mchange.v2.resourcepool.BasicResourcePool - com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@1c8f4b1f -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception: org.postgresql.util.PSQLException: The hostname lkv-srvapp39 could not be verified by hostnameverifier PgjdbcHostnameVerifier. 2022-08-02 09:56:33,348 [C3P0PooledConnectionPoolManager[identityToken->z8kfluaqp0t6ro20pjuq|3ff5aba ]-HelperThread-#0] WARN com.mchange.v2.resourcepool.BasicResourcePool - Having failed to acquire a resource, com.mchange.v2.resourcepool.BasicResourcePool@411ce9ec is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests. 2022-08-02 09:56:33,348 [DefaultQuartzScheduler_Worker-1] WARN org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator - HHH000342: Could not obtain connection to query metadata : Connections could not be acquired from the underlying database! 2022-08-02 09:56:33,354 [C3P0PooledConnectionPoolManager[identityToken->z8kfluaqp0t6ro20pjuq|3ff5aba ]-HelperThread-#1] WARN com.mchange.v2.resourcepool.BasicResourcePool - com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@5ab931dd -- 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: org.postgresql.util.PSQLException: The hostname lkv-srvapp39 could not be verified by hostnameverifier PgjdbcHostnameVerifier. 2022-08-02 09:56:33,354 [C3P0PooledConnectionPoolManager[identityToken->z8kfluaqp0t6ro20pjuq|3ff5aba ]-HelperThread-#1] WARN com.mchange.v2.resourcepool.BasicResourcePool - Having failed to acquire a resource, com.mchange.v2.resourcepool.BasicResourcePool@411ce9ec is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests. 2022-08-02 09:56:33,360 [DefaultQuartzScheduler_Worker-1] WARN net.sf.ehcache.DiskStorePathManager - diskStorePath '/tmp' is already used by an existing CacheManager either in the same VM or in a different process. The diskStore path for this CacheManager will be set to /tmp/ehcache_auto_created2394383558487899130diskstore. To avoid this warning consider using the CacheManager factory methods to create a singleton CacheManager or specifying a separate ehcache configuration (ehcache.xml) for each CacheManager instance. 2022-08-02 09:56:33,361 [C3P0PooledConnectionPoolManager[identityToken->z8kfluaqp0t6ro20pjuq|3ff5aba ]-HelperThread-#2] WARN com.mchange.v2.resourcepool.BasicResourcePool - com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@68e07fff -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception: org.postgresql.util.PSQLException: The hostname lkv-srvapp39 could not be verified by hostnameverifier PgjdbcHostnameVerifier. 2022-08-02 09:56:33,362 [C3P0PooledConnectionPoolManager[identityToken->z8kfluaqp0t6ro20pjuq|3ff5aba ]-HelperThread-#2] WARN com.mchange.v2.resourcepool.BasicResourcePool - Having failed to acquire a resource, com.mchange.v2.resourcepool.BasicResourcePool@411ce9ec is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests. 2022-08-02 09:56:33,374 [C3P0PooledConnectionPoolManager[identityToken->z8kfluaqp0t6ro20pjuq|3ff5aba ]-HelperThread-#1] WARN com.mchange.v2.resourcepool.BasicResourcePool - com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@3b518b25 -- 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: org.postgresql.util.PSQLException: The hostname lkv-srvapp39 could not be verified by hostnameverifier PgjdbcHostnameVerifier. 2022-08-02 09:56:33,374 [C3P0PooledConnectionPoolManager[identityToken->z8kfluaqp0t6ro20pjuq|3ff5aba ]-HelperThread-#0] WARN com.mchange.v2.resourcepool.BasicResourcePool - com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@5599538e -- 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: org.postgresql.util.PSQLException: The hostname lkv-srvapp39 could not be verified by hostnameverifier PgjdbcHostnameVerifier. 2022-08-02 09:56:33,374 [C3P0PooledConnectionPoolManager[identityToken->z8kfluaqp0t6ro20pjuq|3ff5aba ]-HelperThread-#1] WARN com.mchange.v2.resourcepool.BasicResourcePool - Having failed to acquire a resource, com.mchange.v2.resourcepool.BasicResourcePool@411ce9ec is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests. 2022-08-02 09:56:33,375 [DefaultQuartzScheduler_Worker-1] WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper - SQL Error: 0, SQLState: null 2022-08-02 09:56:33,375 [DefaultQuartzScheduler_Worker-1] ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper - Connections could not be acquired from the underlying database! 2022-08-02 09:56:33,375 [C3P0PooledConnectionPoolManager[identityToken->z8kfluaqp0t6ro20pjuq|3ff5aba ]-HelperThread-#0] WARN com.mchange.v2.resourcepool.BasicResourcePool - Having failed to acquire a resource, com.mchange.v2.resourcepool.BasicResourcePool@411ce9ec is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests. 2022-08-02 09:56:33,384 [DefaultQuartzScheduler_Worker-1] ERROR com.redhat.rhn.taskomatic.task.ReportDbUpdateTask - Executing a task threw an exception: org.quartz.JobExecutionException 2022-08-02 09:56:33,385 [DefaultQuartzScheduler_Worker-1] ERROR com.redhat.rhn.taskomatic.task.ReportDbUpdateTask - Message: Unable to update reporting db 2022-08-02 09:56:33,385 [DefaultQuartzScheduler_Worker-1] ERROR com.redhat.rhn.taskomatic.task.ReportDbUpdateTask - Cause: {} org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection Caused by: java.sql.SQLException: Connections could not be acquired from the underlying database! Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source. Caused by: org.postgresql.util.PSQLException: The hostname lkv-srvapp39 could not be verified by hostnameverifier PgjdbcHostnameVerifier. 2022-08-02 09:56:33,387 [DefaultQuartzScheduler_Worker-1] ERROR com.redhat.rhn.taskomatic.task.ReportDbUpdateTask - Stack trace:org.quartz.JobExecutionException: Unable to update reporting db [See nested exception: org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection] Caused by: org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection Caused by: java.sql.SQLException: Connections could not be acquired from the underlying database! Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source. Caused by: org.postgresql.util.PSQLException: The hostname lkv-srvapp39 could not be verified by hostnameverifier PgjdbcHostnameVerifier. 2022-08-02 09:57:00,022 [DefaultQuartzScheduler_Worker-2] WARN org.hibernate.orm.deprecation - HHH90000022: Hibernate's legacy org.hibernate.Criteria API is deprecated; use the JPA javax.persistence.criteria.CriteriaQuery instead Maybe someone has a better understanding of this stuff and can explain what's going wrong? BTW: The messages with "QuartzScheduler" are repeated every minute, independent of the status of "mgr-update-reporting-bunch". TIA! Regards. Tobias Crefeld.