abstractdog commented on code in PR #274:
URL: https://github.com/apache/tez/pull/274#discussion_r1148421781
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tez-runtime-internals/src/main/java/org/apache/tez/runtime/task/TezChild.java:
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@@ -503,6 +506,32 @@ public static TezChild newTezChild(Configuration conf,
String host, int port, St
hadoopShim);
}
+ private static void eagerInitFileSystemPaths(Configuration conf) {
+ Collection<String> eagerInitPaths = conf.getTrimmedStringCollection(
+ TezConfiguration.TASK_EAGER_INIT_FS_PATHS);
+ if (eagerInitFsPool == null && !eagerInitPaths.isEmpty()) {
+ eagerInitFsPool = Executors.newCachedThreadPool(new
ThreadFactoryBuilder()
+ .setDaemon(true)
+ .setPriority(Thread.MAX_PRIORITY)
+ .setNameFormat("Eager-Init-Fs-Thread-%d")
+ .build());
+ }
+ for (String path : eagerInitPaths) {
+ eagerInitFsPool.execute(new Runnable() {
+ @Override
+ public void run() {
+ try {
+ new Path(path).getFileSystem(conf);
+ LOG.info("Eagerly initiated FileSystem at path {}", path);
Review Comment:
it would be nice to measure the time spent with initialization and print it
to logs too
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