From e1d0aa9ee5851d3cdc3b125daebe5cc9305ad6f0 Mon Sep 17 00:00:00 2001
From: liever18 <47295183+liever18@users.noreply.github.com>
Date: Wed, 5 Jan 2022 23:42:58 +0800
Subject: [PATCH] HDFS-16408. Ensure LeaseRecheckIntervalMs is greater than
 zero (#3856)

---
 .../org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java  | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
index c07115efdf..610303a22a 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
@@ -1014,6 +1014,10 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
       this.leaseRecheckIntervalMs = conf.getLong(
           DFS_NAMENODE_LEASE_RECHECK_INTERVAL_MS_KEY,
           DFS_NAMENODE_LEASE_RECHECK_INTERVAL_MS_DEFAULT);
+      Preconditions.checkArgument(
+              leaseRecheckIntervalMs > 0,
+              DFSConfigKeys.DFS_NAMENODE_LEASE_RECHECK_INTERVAL_MS_KEY +
+                      " must be greater than zero");
       this.maxLockHoldToReleaseLeaseMs = conf.getLong(
           DFS_NAMENODE_MAX_LOCK_HOLD_TO_RELEASE_LEASE_MS_KEY,
           DFS_NAMENODE_MAX_LOCK_HOLD_TO_RELEASE_LEASE_MS_DEFAULT);