Merge pull request #27118 from vespa-engine/jonmv/random-connection-ttl-variations

Initiate connections shutdown uniform-randomly up to 10% before conn TTL expiry

1 files changed, 2 insertions, 1 deletions

diff --git a/container-core/src/main/java/com/yahoo/jdisc/http/server/jetty/HttpRequestDispatch.java b/container-core/src/main/java/com/yahoo/jdisc/http/server/jetty/HttpRequestDispatch.java
index f9a2e3bc1a6..b92a723fac8 100644
--- a/container-core/src/main/java/com/yahoo/jdisc/http/server/jetty/HttpRequestDispatch.java
+++ b/container-core/src/main/java/com/yahoo/jdisc/http/server/jetty/HttpRequestDispatch.java
@@ -163,7 +163,8 @@ class HttpRequestDispatch {
         double maxConnectionLifeInSeconds = connectorConfig.maxConnectionLife();
         if (maxConnectionLifeInSeconds > 0) {
             long createdAt = connection.getCreatedTimeStamp();
-            Instant expiredAt = Instant.ofEpochMilli((long) (createdAt + maxConnectionLifeInSeconds * 1000));
+            long tenPctVariance = connection.hashCode() % 10; // should be random enough, and must be consistent for a given connection
+            Instant expiredAt = Instant.ofEpochMilli((long) (createdAt + maxConnectionLifeInSeconds * 10 * (100 - tenPctVariance)));
             boolean isExpired = Instant.now().isAfter(expiredAt);
             if (isExpired) {
                 gracefulShutdown(connection);