From e8f823ef466b8a1bc9451fcb74bbbadcad29a59b Mon Sep 17 00:00:00 2001
From: Tatsushi Inagaki <e29253@jp.ibm.com>
Date: Fri, 27 Sep 2019 05:26:45 +0900
Subject: [PATCH] Fix broken pipe due to /usr/bin/ldd (#9606)

Motivation:

The build script for the module Netty Transport Native Epoll can cause
intermittent build break due to broken pipe by /usr/bin/ldd. This issue
likely to occur on a build environment with multiple processors.

Modifications:

The root cause is that the consumer head command finishes earlier the
producer ldd command. Buffering the outputs of the ldd command by an
intermediate tail command avoids the broken pipe.

Result:

A build on multiple processors can finish successfully.

Signed-off-by: Tatsushi Inagaki <e29253@jp.ibm.com>
---
 transport-native-epoll/pom.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/transport-native-epoll/pom.xml b/transport-native-epoll/pom.xml
index fda5a0b14fa..80f7291f712 100644
--- a/transport-native-epoll/pom.xml
+++ b/transport-native-epoll/pom.xml
@@ -208,7 +208,7 @@
                   <tasks>
                     <exec executable="sh" outputproperty="ldd_version">
                       <arg value="-c" />
-                      <arg value="ldd --version | head -1" />
+                      <arg value="ldd --version | tail | head -1" />
                     </exec>
                     <exec executable="uname" outputproperty="uname_os_version">
                       <arg value="-r" />