From 8b8bf041c87088dde1d71b7e23a4d9881f37be8f Mon Sep 17 00:00:00 2001
From: Jon Marius Venstad <venstad@gmail.com>
Date: Tue, 8 Sep 2020 16:23:04 +0200
Subject: Flush log stream every 64k lines as well

---
 .../src/main/java/com/yahoo/container/handler/LogReader.java           | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/container-core/src/main/java/com/yahoo/container/handler/LogReader.java b/container-core/src/main/java/com/yahoo/container/handler/LogReader.java
index 2884eb486ca..a304dc3c4ff 100644
--- a/container-core/src/main/java/com/yahoo/container/handler/LogReader.java
+++ b/container-core/src/main/java/com/yahoo/container/handler/LogReader.java
@@ -72,9 +72,12 @@ class LogReader {
 
                 Iterator<LineWithTimestamp> lines = Iterators.mergeSorted(logLineIterators,
                                                                           Comparator.comparingDouble(LineWithTimestamp::timestamp));
+                long linesWritten = 0;
                 while (lines.hasNext()) {
                     writer.write(lines.next().line());
                     writer.newLine();
+                    if ((++linesWritten & ((1 << 16) - 1)) == 0)
+                        writer.flush();
                 }
             }
             catch (IOException e) {
-- 
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