spark git commit: [SPARK-11999][CORE] Fix the issue that ThreadUtils.newDaemonCachedThreadPool doesn't cache any task

Repository: spark Updated Branches: refs/heads/branch-1.4 1df3e8230 -> f5af299ab [SPARK-11999][CORE] Fix the issue that ThreadUtils.newDaemonCachedThreadPool doesn't cache any task In the previous codes, `newDaemonCachedThreadPool` uses `SynchronousQueue`, which is wrong. `SynchronousQueue`

spark git commit: [SPARK-11999][CORE] Fix the issue that ThreadUtils.newDaemonCachedThreadPool doesn't cache any task

Repository: spark Updated Branches: refs/heads/branch-1.5 b1fcefca6 -> 7900d192e [SPARK-11999][CORE] Fix the issue that ThreadUtils.newDaemonCachedThreadPool doesn't cache any task In the previous codes, `newDaemonCachedThreadPool` uses `SynchronousQueue`, which is wrong. `SynchronousQueue`

spark git commit: [SPARK-11999][CORE] Fix the issue that ThreadUtils.newDaemonCachedThreadPool doesn't cache any task

Repository: spark Updated Branches: refs/heads/branch-1.6 7e7f2627f -> 0df6beccc [SPARK-11999][CORE] Fix the issue that ThreadUtils.newDaemonCachedThreadPool doesn't cache any task In the previous codes, `newDaemonCachedThreadPool` uses `SynchronousQueue`, which is wrong. `SynchronousQueue`

spark git commit: [SPARK-11999][CORE] Fix the issue that ThreadUtils.newDaemonCachedThreadPool doesn't cache any task

Repository: spark Updated Branches: refs/heads/master 068b6438d -> d3ef69332 [SPARK-11999][CORE] Fix the issue that ThreadUtils.newDaemonCachedThreadPool doesn't cache any task In the previous codes, `newDaemonCachedThreadPool` uses `SynchronousQueue`, which is wrong. `SynchronousQueue` is a