From b55a3f32b8cfce97503940af28fca9d0209bda21 Mon Sep 17 00:00:00 2001
From: Robert Muir <rmuir@apache.org>
Date: Wed, 1 Jul 2015 10:04:36 -0400
Subject: [PATCH] Add debug logging in case classpath is crazy

---
 .../main/java/org/elasticsearch/bootstrap/JarHell.java   | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/core/src/main/java/org/elasticsearch/bootstrap/JarHell.java b/core/src/main/java/org/elasticsearch/bootstrap/JarHell.java
index 40edc695689..fecc370f748 100644
--- a/core/src/main/java/org/elasticsearch/bootstrap/JarHell.java
+++ b/core/src/main/java/org/elasticsearch/bootstrap/JarHell.java
@@ -21,6 +21,8 @@ package org.elasticsearch.bootstrap;
 
 import org.elasticsearch.common.SuppressForbidden;
 import org.elasticsearch.common.io.PathUtils;
+import org.elasticsearch.common.logging.ESLogger;
+import org.elasticsearch.common.logging.Loggers;
 
 import java.io.IOException;
 import java.net.URL;
@@ -31,6 +33,7 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.SimpleFileVisitor;
 import java.nio.file.attribute.BasicFileAttributes;
+import java.util.Arrays;
 import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -52,6 +55,12 @@ public class JarHell {
         if (loader instanceof URLClassLoader == false) {
            return;
         }
+        ESLogger logger = Loggers.getLogger(JarHell.class);
+        if (logger.isDebugEnabled()) {
+            logger.debug("java.class.path= {}" + System.getProperty("java.class.path"));
+            logger.debug("sun.boot.class.path= {}" + System.getProperty("sun.boot.class.path"));
+            logger.debug("classloader urls= {}" + Arrays.toString(((URLClassLoader)loader).getURLs()));
+        }
         checkJarHell(((URLClassLoader)loader).getURLs());
     }