Ultra Pipeline failure: "Lost connection to feed-masters"

Hi,

Recently we noticed some transient ultra pipeline execution failures… in what are normally working pipelines with the following error messages:
Lost connection to feed-masters

Reason:
Snap failed unexpectedly and did not provide any reason
Hide Details…
SnapCompletionService
com.snaplogic.cc.snap.common.SnapStreamException: Lost connection to feed-masters
at com.snaplogic.cc.jstream.view.feed.LLFeedReceiver.receive(LLFeedReceiver.java:172)
at com.snaplogic.cc.snap.view.document.DocumentInputViewImpl$DocumentIterator.lambda$loadNextDocument$0(DocumentInputViewImpl.java:236)
at com.snaplogic.cc.snap.common.ViewImpl.timeCall(ViewImpl.java:250)
at com.snaplogic.cc.snap.view.document.DocumentInputViewImpl.access$300(DocumentInputViewImpl.java:52)
at com.snaplogic.cc.snap.view.document.DocumentInputViewImpl$DocumentIterator.loadNextDocument(DocumentInputViewImpl.java:236)
at com.snaplogic.cc.snap.view.document.DocumentInputViewImpl$DocumentIterator.hasNext(DocumentInputViewImpl.java:203)
at com.snaplogic.snap.api.ExecutionUtil.execute(ExecutionUtil.java:98)
at com.snaplogic.snap.api.ExecutionUtil.execute(ExecutionUtil.java:68)
at com.snaplogic.snap.api.SimpleSnap.execute(SimpleSnap.java:66)
at com.snaplogic.cc.snap.common.SnapRunnableImpl.executeSnap(SnapRunnableImpl.java:709)
at com.snaplogic.cc.snap.common.SnapRunnableImpl.execute(SnapRunnableImpl.java:489)
at com.snaplogic.cc.snap.common.SnapRunnableImpl.doRun(SnapRunnableImpl.java:770)
at com.snaplogic.cc.snap.common.SnapRunnableImpl.access$000(SnapRunnableImpl.java:108)
at com.snaplogic.cc.snap.common.SnapRunnableImpl$1.run(SnapRunnableImpl.java:335)
at com.snaplogic.cc.snap.common.SnapRunnableImpl$1.run(SnapRunnableImpl.java:331)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
at com.snaplogic.cc.snap.common.SnapRunnableImpl.call(SnapRunnableImpl.java:330)
at com.snaplogic.cc.snap.common.SnapRunnableImpl.call(SnapRunnableImpl.java:108)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

Error Fingerprint[0] = efp:com.snaplogic.cc.jstream.view.feed.MPVkNeT-

Has anyone encountered this error or know of the cause?