[ https://issues.apache.org/jira/browse/FLINK-9923?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16553358#comment-16553358 ]
Till Rohrmann commented on FLINK-9923: -------------------------------------- I think the problem is that {{WatermarkGauge's}} {{currentWatermark}} field is not volatile but can be accessed by multiple threads. > OneInputStreamTaskTest.testWatermarkMetrics fails on Travis > ----------------------------------------------------------- > > Key: FLINK-9923 > URL: https://issues.apache.org/jira/browse/FLINK-9923 > Project: Flink > Issue Type: Bug > Components: Tests > Affects Versions: 1.6.0 > Reporter: Till Rohrmann > Priority: Critical > Labels: test-stability > Fix For: 1.6.0 > > > {{OneInputStreamTaskTest.testWatermarkMetrics}} fails on Travis with > {code} > java.lang.AssertionError: expected:<1> but was:<-9223372036854775808> > at org.junit.Assert.fail(Assert.java:88) > at org.junit.Assert.failNotEquals(Assert.java:834) > at org.junit.Assert.assertEquals(Assert.java:645) > at org.junit.Assert.assertEquals(Assert.java:631) > at > org.apache.flink.streaming.runtime.tasks.OneInputStreamTaskTest.testWatermarkMetrics(OneInputStreamTaskTest.java:731) > {code} > https://api.travis-ci.org/v3/job/407196285/log.txt -- This message was sent by Atlassian JIRA (v7.6.3#76005)