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Review request for samza. Bugs: SAMZA-723 https://issues.apache.org/jira/browse/SAMZA-723 Repository: samza Description ------- fixed 2 parts of the problem: 1. Start streamAppender until the JobCoordinator is running 2. deadlock in Producer thread and the main thread More explanation is in JIRA. Diffs ----- samza-core/src/main/scala/org/apache/samza/coordinator/JobCoordinator.scala a926ce639dbf6776ebfb1d885621f4b6bf5f5aa5 samza-log4j/src/main/java/org/apache/samza/config/Log4jSystemConfig.java d98b8c658dd8ae4d952a1004a796d64c229012a7 samza-log4j/src/main/java/org/apache/samza/logging/log4j/StreamAppender.java 776a36bd539f747d440a65f844cfcede52625e1b samza-log4j/src/test/java/org/apache/samza/logging/log4j/TestStreamAppender.java 1c6f9a48590d55fe808940adba72415c3ab9614e Diff: https://reviews.apache.org/r/39464/diff/ Testing ------- Verified with hello-samza. Still investigating to understand the original cause and the fix Thanks, Navina Ramesh