Timing issue in Execute SQL Statement?

Hello, I am seeing an intermittent issue when running the Execute SQL Statement command (Data Integration v7.1.0.2) in a Kettle Job. In the logs, I am seeing message "Triggering heartbeat signal for <job> at every 10 seconds" repeatedly.

Thread dump details follow.

Thread-38 appears to be stuck due to waiting for a lock on DriverManager. I am not familiar enough with the code in FelixStartThread to know what it is doing. Is this an issue with the way I am using Kettle, or something else?

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"Thread-38" #68 prio=5 os_prio=0 tid=0x0000000058956800 nid=0x1524 in Object.wait() [0x00000000633ce000]
java.lang.Thread.State: RUNNABLE
at org.mariadb.jdbc.Driver.<clinit>(Driver.java:69)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at org.pentaho.di.core.database.Database.connectUsingClass(Database.java:508)
- locked <0x0000000081e4bd20> (a java.lang.Class for java.sql.DriverManager)
at org.pentaho.di.core.database.Database.normalConnect(Database.java:456)
at org.pentaho.di.core.database.Database.connect(Database.java:370)
- locked <0x0000000081f2e6b8> (a org.pentaho.di.core.database.Database)
at org.pentaho.di.job.entries.sql.JobEntrySQL.execute(JobEntrySQL.java:243)
at org.pentaho.di.job.Job.execute(Job.java:724)
at org.pentaho.di.job.Job.execute(Job.java:865)
at org.pentaho.di.job.Job.execute(Job.java:865)
at org.pentaho.di.job.Job.execute(Job.java:546)
at org.pentaho.di.job.Job.run(Job.java:436)

"FelixStartLevel" #17 daemon prio=5 os_prio=0 tid=0x0000000059e1a800 nid=0x1784 in Object.wait() [0x000000005b44c000]
java.lang.Thread.State: RUNNABLE
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.lang.Class.newInstance(Class.java:442)
at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:380)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
at java.sql.DriverManager$2.run(DriverManager.java:603)
at java.sql.DriverManager$2.run(DriverManager.java:583)
at java.security.AccessController.doPrivileged(Native Method)
at java.sql.DriverManager.loadInitialDrivers(DriverManager.java:583)
at java.sql.DriverManager.<clinit>(DriverManager.java:101)
at org.pentaho.big.data.api.jdbc.impl.ClusterInitializingDriver$$Lambda$18/100754647.registerDriver(Unknown Source)
at org.pentaho.big.data.api.jdbc.impl.ClusterInitializingDriver.<init>(ClusterInitializingDriver.java:79)
at org.pentaho.big.data.api.jdbc.impl.ClusterInitializingDriver.<init>(ClusterInitializingDriver.java:70)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.apache.aries.blueprint.utils.ReflectionUtils.newInstance(ReflectionUtils.java:329)
at org.apache.aries.blueprint.container.BeanRecipe.newInstance(BeanRecipe.java:962)
at org.apache.aries.blueprint.container.BeanRecipe.getInstance(BeanRecipe.java:331)
at org.apache.aries.blueprint.container.BeanRecipe.internalCreate2(BeanRecipe.java:806)
at org.apache.aries.blueprint.container.BeanRecipe.internalCreate(BeanRecipe.java:787)
at org.apache.aries.blueprint.di.AbstractRecipe$1.call(AbstractRecipe.java:79)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.apache.aries.blueprint.di.AbstractRecipe.create(AbstractRecipe.java:88)
at org.apache.aries.blueprint.container.BlueprintRepository.createInstances(BlueprintRepository.java:245)
at org.apache.aries.blueprint.container.BlueprintRepository.createAll(BlueprintRepository.java:183)
at org.apache.aries.blueprint.container.BlueprintContainerImpl.instantiateEagerComponents(BlueprintContainerImpl.java:682)
at org.apache.aries.blueprint.container.BlueprintContainerImpl.doRun(BlueprintContainerImpl.java:377)
at org.apache.aries.blueprint.container.BlueprintContainerImpl.run(BlueprintContainerImpl.java:269)
- locked <0x0000000081a7c978> (a java.util.concurrent.atomic.AtomicBoolean)
at org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:294)
at org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:263)
at org.apache.aries.blueprint.container.BlueprintExtender.modifiedBundle(BlueprintExtender.java:253)
at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerModified(BundleHookBundleTracker.java:500)
at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerModified(BundleHookBundleTracker.java:433)
at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$AbstractTracked.track(BundleHookBundleTracker.java:725)
at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.bundleChanged(BundleHookBundleTracker.java:463)
at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$BundleEventHook.event(BundleHookBundleTracker.java:422)
at org.apache.felix.framework.util.SecureAction.invokeBundleEventHook(SecureAction.java:1127)
at org.apache.felix.framework.util.EventDispatcher.createWhitelistFromHooks(EventDispatcher.java:696)
at org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:484)
at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4429)
at org.apache.felix.framework.Felix.startBundle(Felix.java:2100)
at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1299)
at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:304)
at java.lang.Thread.run(Thread.java:748)