Blocker Description
org.apache.spark.JavaJdbcRDDSuite.testJavaJdbcRDD has been failing due to multiple spark contexts: https://amplab.cs.berkeley.edu/jenkins/job/spark-branch-2.3-test-maven-hadoop-2.6/
Only one SparkContext may be running in this JVM (see SPARK-2243). To ignore this error, set spark.driver.allowMultipleContexts = true. The currently running SparkContext was created at: org.apache.spark.SparkContext.<init>(SparkContext.scala:116) org.apache.spark.launcher.SparkLauncherSuite$InProcessTestApp.main(SparkLauncherSuite.java:182) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.apache.spark.deploy.JavaMainApplication.start(SparkApplication.scala:52) org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:879) org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:197) org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:227) org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:136) org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.apache.spark.launcher.InProcessAppHandle.lambda$start$0(InProcessAppHandle.java:63) java.lang.Thread.run(Thread.java:748)
