ConnectionPoolHealthSqlInterceptor logs dangerous use of multiple connections WARN messages when processing mail

2016-03-02 04:02:32,257 Caesium-2-2 WARN anonymous     [c.a.jira.ofbiz.ConnectionPoolHealthSqlInterceptor] Dangerous use of multiple connections: replaced => count=2; marks=[1-3]; pool=2/20
java.lang.AssertionError: Explicit stack trace requested
	at com.atlassian.jira.util.log.RateLimitingLogger.warnWithTrace(RateLimitingLogger.java:141)
	at com.atlassian.jira.ofbiz.ConnectionPoolHealthSqlInterceptor$CountHolder.logWarn(ConnectionPoolHealthSqlInterceptor.java:240)
	at com.atlassian.jira.ofbiz.ConnectionPoolHealthSqlInterceptor$CountHolder.replaced(ConnectionPoolHealthSqlInterceptor.java:269)
	at com.atlassian.jira.ofbiz.ConnectionPoolHealthSqlInterceptor.onConnectionReplaced(ConnectionPoolHealthSqlInterceptor.java:98)
	at com.atlassian.jira.ofbiz.ChainedSQLInterceptor.lambda$onConnectionReplaced$712(ChainedSQLInterceptor.java:70)
	at com.atlassian.jira.ofbiz.ChainedSQLInterceptor.forEach(ChainedSQLInterceptor.java:93)
	at com.atlassian.jira.ofbiz.ChainedSQLInterceptor.onConnectionReplaced(ChainedSQLInterceptor.java:69)
	at org.ofbiz.core.entity.jdbc.interceptors.connection.SafeDelegatingSqlConnectionInterceptor.onConnectionReplaced(SafeDelegatingSqlConnectionInterceptor.java:47)
	at org.ofbiz.core.entity.jdbc.interceptors.connection.ConnectionTracker$DelegatingConnectionImpl.close(ConnectionTracker.java:99)
	at com.atlassian.pocketknife.spi.querydsl.AbstractConnectionProvider.returnConnection(AbstractConnectionProvider.java:79)
	at com.atlassian.pocketknife.internal.querydsl.QueryFactoryImpl.fetch(QueryFactoryImpl.java:79)
	at com.atlassian.jira.internal.mail.processor.querydsl.QueryDslHelper.get(QueryDslHelper.java:322)
	at com.atlassian.jira.internal.mail.processor.querydsl.QueryDslHelper.getById(QueryDslHelper.java:290)
	at com.atlassian.jira.internal.mail.processor.querydsl.QueryDslHelper$1.apply(QueryDslHelper.java:214)
	at com.atlassian.jira.internal.mail.processor.querydsl.QueryDslHelper$1.apply(QueryDslHelper.java:173)
	at com.atlassian.pocketknife.internal.querydsl.QueryFactoryImpl.insert(QueryFactoryImpl.java:189)
	at com.atlassian.jira.internal.mail.processor.querydsl.QueryDslHelper.create(QueryDslHelper.java:173)
	at com.atlassian.jira.internal.mail.processor.feature.audit.mailitem.MailItemAuditStore.createMailItemAudit(MailItemAuditStore.java:99)
	at com.atlassian.jira.internal.mail.processor.feature.audit.mailitem.MailItemAuditManager.saveMailItemAudit(MailItemAuditManager.java:43)
	at com.atlassian.jira.internal.mail.processor.feature.processor.MailHandlerWorker.saveAuditLog(MailHandlerWorker.java:117)
	at com.atlassian.jira.internal.mail.processor.feature.processor.MailHandlerWorker.handle(MailHandlerWorker.java:79)
	at com.atlassian.jira.internal.mail.processor.feature.processor.MailProcessorWorker.processMailItem(MailProcessorWorker.java:129)
	at com.atlassian.jira.internal.mail.processor.feature.processor.MailProcessorWorker.process(MailProcessorWorker.java:76)
	at com.atlassian.jira.internal.mail.processor.feature.processor.MailProcessorService.run(MailProcessorService.java:36)
	at com.atlassian.jira.internal.mail.processor.services.MailProcessorExecutor.run(MailProcessorExecutor.java:30)
	at com.atlassian.jira.internal.mail.processor.services.AbstractMailExecutor.execute(AbstractMailExecutor.java:42)
	at com.atlassian.jira.internal.mail.processor.services.MailJobRunner.runJob(MailJobRunner.java:35)
	at com.atlassian.scheduler.core.JobLauncher.runJob(JobLauncher.java:153)
	at com.atlassian.scheduler.core.JobLauncher.launchAndBuildResponse(JobLauncher.java:118)
	at com.atlassian.scheduler.core.JobLauncher.launch(JobLauncher.java:97)
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.launchJob(CaesiumSchedulerService.java:401)
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJob(CaesiumSchedulerService.java:396)
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeQueuedJob(CaesiumSchedulerService.java:349)
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService$1.consume(CaesiumSchedulerService.java:255)
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService$1.consume(CaesiumSchedulerService.java:252)
	at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeJob(SchedulerQueueWorker.java:65)
	at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeNextJob(SchedulerQueueWorker.java:59)
	at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.run(SchedulerQueueWorker.java:34)
	at java.lang.Thread.run(Thread.java:745)