title: Unable to obtain isolated JDBC connection: org.hibernate.exception.JDBCConnectionException
body: <p>I am facing this problem for 2 hours.</p>
  
  <p>The problem is I have other classes that are working well. I don't know why this error is happening for the current class.</p>
  
  <pre><code>org.hibernate.exception.JDBCConnectionException: unable to obtain isolated JDBC connection
  Caused by: java.sql.SQLTransientConnectionException: HikariPool-1 - Connection is not available, request timed out after 351ms.
  </code></pre>
  
  <p>But the code works for other tables(other classes).</p>
  
  <p>It was working so fine until today. Is there anyone that faced this problem before?</p>
  
  <pre><code>2020-03-13 13:52:25,392 [main] WARN  com.zaxxer.hikari.HikariConfig -ScraperPool - idleTimeout is less than 10000ms, setting to default 600000ms.
  2020-03-13 13:52:25,400 [main] DEBUG com.zaxxer.hikari.HikariConfig -ScraperPool - configuration:
  2020-03-13 13:52:25,406 [main] DEBUG com.zaxxer.hikari.HikariConfig -allowPoolSuspension.............false
  2020-03-13 13:52:25,407 [main] DEBUG com.zaxxer.hikari.HikariConfig -autoCommit......................true
  2020-03-13 13:52:25,407 [main] DEBUG com.zaxxer.hikari.HikariConfig -catalog.........................none
  2020-03-13 13:52:25,408 [main] DEBUG com.zaxxer.hikari.HikariConfig -connectionInitSql...............none
  2020-03-13 13:52:25,408 [main] DEBUG com.zaxxer.hikari.HikariConfig -connectionTestQuery.............none
  2020-03-13 13:52:25,409 [main] DEBUG com.zaxxer.hikari.HikariConfig -connectionTimeout...............10000
  2020-03-13 13:52:25,409 [main] DEBUG com.zaxxer.hikari.HikariConfig -dataSource......................none
  2020-03-13 13:52:25,409 [main] DEBUG com.zaxxer.hikari.HikariConfig -dataSourceClassName.............none
  2020-03-13 13:52:25,410 [main] DEBUG com.zaxxer.hikari.HikariConfig -dataSourceJNDI..................none
  2020-03-13 13:52:25,411 [main] DEBUG com.zaxxer.hikari.HikariConfig -dataSourceProperties............{password=&lt;masked&gt;, prepStmtCacheSqlLimit=2048, cachePrepStmts=true, prepStmtCacheSize=250, leakDetectionThreshold=15000}
  2020-03-13 13:52:25,412 [main] DEBUG com.zaxxer.hikari.HikariConfig -driverClassName.................none
  2020-03-13 13:52:25,412 [main] DEBUG com.zaxxer.hikari.HikariConfig -healthCheckProperties...........{}
  2020-03-13 13:52:25,412 [main] DEBUG com.zaxxer.hikari.HikariConfig -healthCheckRegistry.............none
  2020-03-13 13:52:25,413 [main] DEBUG com.zaxxer.hikari.HikariConfig -idleTimeout.....................600000
  2020-03-13 13:52:25,413 [main] DEBUG com.zaxxer.hikari.HikariConfig -initializationFailTimeout.......1
  2020-03-13 13:52:25,413 [main] DEBUG com.zaxxer.hikari.HikariConfig -isolateInternalQueries..........false
  2020-03-13 13:52:25,414 [main] DEBUG com.zaxxer.hikari.HikariConfig -jdbcUrl.........................jdbc:mysql://**********?verifyServerCertificate=false&amp;useSSL=true&amp;serverTimezone=UTC
  2020-03-13 13:52:25,414 [main] DEBUG com.zaxxer.hikari.HikariConfig -leakDetectionThreshold..........10000
  2020-03-13 13:52:25,414 [main] DEBUG com.zaxxer.hikari.HikariConfig -maxLifetime.....................1800000
  2020-03-13 13:52:25,414 [main] DEBUG com.zaxxer.hikari.HikariConfig -maximumPoolSize.................100
  2020-03-13 13:52:25,415 [main] DEBUG com.zaxxer.hikari.HikariConfig -metricRegistry..................none
  2020-03-13 13:52:25,415 [main] DEBUG com.zaxxer.hikari.HikariConfig -metricsTrackerFactory...........none
  2020-03-13 13:52:25,415 [main] DEBUG com.zaxxer.hikari.HikariConfig -minimumIdle.....................4
  2020-03-13 13:52:25,415 [main] DEBUG com.zaxxer.hikari.HikariConfig -password........................&lt;masked&gt;
  2020-03-13 13:52:25,416 [main] DEBUG com.zaxxer.hikari.HikariConfig -poolName........................"ScraperPool"
  2020-03-13 13:52:25,416 [main] DEBUG com.zaxxer.hikari.HikariConfig -readOnly........................false
  2020-03-13 13:52:25,416 [main] DEBUG com.zaxxer.hikari.HikariConfig -registerMbeans..................true
  2020-03-13 13:52:25,417 [main] DEBUG com.zaxxer.hikari.HikariConfig -scheduledExecutor...............none
  2020-03-13 13:52:25,417 [main] DEBUG com.zaxxer.hikari.HikariConfig -schema..........................none
  2020-03-13 13:52:25,417 [main] DEBUG com.zaxxer.hikari.HikariConfig -threadFactory...................internal
  2020-03-13 13:52:25,417 [main] DEBUG com.zaxxer.hikari.HikariConfig -transactionIsolation............default
  2020-03-13 13:52:25,418 [main] DEBUG com.zaxxer.hikari.HikariConfig -username........................"xxxxxxxxxxx"
  2020-03-13 13:52:25,418 [main] DEBUG com.zaxxer.hikari.HikariConfig -validationTimeout...............5000
  2020-03-13 13:52:25,420 [main] INFO  com.zaxxer.hikari.HikariDataSource -ScraperPool - Starting...
  2020-03-13 13:52:25,452 [main] DEBUG com.zaxxer.hikari.util.DriverDataSource -Loaded driver with class name com.mysql.cj.jdbc.Driver for jdbcUrl=jdbc:mysql://*********?verifyServerCertificate=false&amp;useSSL=true&amp;serverTimezone=UTC
  2020-03-13 13:52:27,099 [main] DEBUG com.zaxxer.hikari.pool.HikariPool -ScraperPool - Added connection com.mysql.cj.jdbc.ConnectionImpl@e84a8e1
  2020-03-13 13:52:27,107 [main] INFO  com.zaxxer.hikari.HikariDataSource -ScraperPool - Start completed.
  2020-03-13 13:52:27,211 [ScraperPool housekeeper] DEBUG com.zaxxer.hikari.pool.HikariPool -ScraperPool - Before cleanup stats (total=1, active=0, idle=1, waiting=0)
  2020-03-13 13:52:27,212 [ScraperPool housekeeper] DEBUG com.zaxxer.hikari.pool.HikariPool -ScraperPool - After cleanup  stats (total=1, active=0, idle=1, waiting=0)
  2020-03-13 13:52:27,280 [ScraperPool connection adder] DEBUG com.zaxxer.hikari.pool.HikariPool -ScraperPool - Added connection com.mysql.cj.jdbc.ConnectionImpl@58b0aed5
  2020-03-13 13:52:27,346 [ScraperPool connection adder] DEBUG com.zaxxer.hikari.pool.HikariPool -ScraperPool - Added connection com.mysql.cj.jdbc.ConnectionImpl@285edfdd
  2020-03-13 13:52:27,414 [ScraperPool connection adder] DEBUG com.zaxxer.hikari.pool.HikariPool -ScraperPool - Added connection com.mysql.cj.jdbc.ConnectionImpl@79a25ba1
  2020-03-13 13:52:27,415 [ScraperPool connection adder] DEBUG com.zaxxer.hikari.pool.HikariPool -ScraperPool - After adding stats (total=4, active=0, idle=4, waiting=0)
  </code></pre>
  
  <p>I got this line before the error occured</p>
  
  <pre><code>DEBUG com.zaxxer.hikari.pool.HikariPool -HikariPool-1 - Timeout failure stats (total=1, active=1, idle=0, waiting=0)
  </code></pre>