From 2714bb2fefb878f53ff74d6b50dff5f4c5373a6a Mon Sep 17 00:00:00 2001
From: Dmitry Vyazelenko <696855+vyazelenko@users.noreply.github.com>
Date: Tue, 10 Dec 2019 23:44:31 +0100
Subject: [PATCH] [Java] Print stacktrace to `System.err` and ensure the same
 `PrintStream` instance is used

---
 aeron-client/src/main/java/io/aeron/Aeron.java | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/aeron-client/src/main/java/io/aeron/Aeron.java b/aeron-client/src/main/java/io/aeron/Aeron.java
index 0cfefdbc21..7e58c7f06a 100644
--- a/aeron-client/src/main/java/io/aeron/Aeron.java
+++ b/aeron-client/src/main/java/io/aeron/Aeron.java
@@ -521,14 +521,15 @@ public static class Configuration
         public static final ErrorHandler DEFAULT_ERROR_HANDLER =
             (throwable) ->
             {
-                synchronized (System.err)
+                final PrintStream err = System.err;
+                synchronized (err)
                 {
-                    System.err.println(System.currentTimeMillis() + " Exception:");
-                    throwable.printStackTrace();
+                    err.println(System.currentTimeMillis() + " Exception:");
+                    throwable.printStackTrace(err);
                 }
                 if (throwable instanceof DriverTimeoutException)
                 {
-                    System.err.printf(
+                    err.printf(
                         "%n***%n*** timeout for the Media Driver - is it currently running? exiting%n***%n");
                     System.exit(-1);
                 }