Fail to run two jobs simultaneously in two contexts · Issue #147 · spark-jobserver/spark-jobserver · GitHub
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PySpark Exception: #This SparkContext may be an existing one. · Issue #4960 · jupyter/notebook · GitHub
jvm-packages]mvn package failed with test error. Only one SparkContext may be running in this JVM · Issue #1361 · dmlc/xgboost · GitHub
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