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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2023/01/04 01:30:12 UTC
[GitHub] [hadoop] szetszwo commented on a diff in pull request #5268: HDFS-16881. Warn if AccessControlEnforcer runs for a long time to check permission.
szetszwo commented on code in PR #5268:
URL: https://github.com/apache/hadoop/pull/5268#discussion_r1061074364
##########
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java:
##########
@@ -388,6 +392,12 @@ public enum DirOp {
DFS_PROTECTED_SUBDIRECTORIES_ENABLE,
DFS_PROTECTED_SUBDIRECTORIES_ENABLE_DEFAULT);
+ final long readLockThresholdMs = conf.getLong(
+ DFS_NAMENODE_READ_LOCK_REPORTING_THRESHOLD_MS_KEY,
+ DFS_NAMENODE_READ_LOCK_REPORTING_THRESHOLD_MS_DEFAULT);
+ // use half of read lock threshold
Review Comment:
Indeed, let's make it configurable.
##########
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSPermissionChecker.java:
##########
@@ -446,4 +447,20 @@ private static INodeFile createINodeFile(INodeDirectory parent, String name,
parent.addChild(inodeFile);
return inodeFile;
}
+
+ @Test
+ public void testCheckAccessControlEnforcerSlowness() throws Exception {
+ final long thresholdMs = 10;
+ final String message = FSPermissionChecker.runCheckPermission(() -> {
+ try {
+ Thread.sleep(20);
+ } catch (InterruptedException e) {
+ throw new RuntimeException(e);
Review Comment:
Sure. Thanks for pointing out the JUnit behavior.
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