NullPointerException when url in Log4j2Plugin is null

[mpeterka]

HOTSWAP AGENT: 09:56:08.424 INFO (org.hotswap.agent.config.PluginRegistry) - Plugin 'org.hotswap.agent.plugin.log4j2.Log4j2Plugin' initialized in ClassLoader 'ContextLoader@Service Provisioning Manager - Service Provisioning'.
HOTSWAP AGENT: 09:56:08.430 ERROR (org.hotswap.agent.plugin.log4j2.Log4j2Plugin) - Exception initializing Log4j2 on uri null.
java.lang.NullPointerException
	at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:98)
	at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:77)
	at sun.nio.fs.WindowsPath.parse(WindowsPath.java:94)
	at sun.nio.fs.WindowsFileSystem.getPath(WindowsFileSystem.java:255)
	at java.nio.file.Paths.get(Paths.java:84)
	at org.hotswap.agent.plugin.log4j2.Log4j2Plugin.init(Log4j2Plugin.java:62)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:551)
	at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:603)
	at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:620)
	at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:226)
	at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:152)
	at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
	at org.apache.logging.log4j.LogManager.getContext(LogManager.java:194)
	at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:551)
	at org.elasticsearch.common.logging.ESLoggerFactory.getLogger(ESLoggerFactory.java:49)
	at org.elasticsearch.common.logging.Loggers.getLogger(Loggers.java:105)
	at org.elasticsearch.common.logging.Loggers.getLogger(Loggers.java:72)
	at org.elasticsearch.common.component.AbstractComponent.<init>(AbstractComponent.java:37)
	at org.elasticsearch.plugins.PluginsService.<init>(PluginsService.java:98)
	at org.elasticsearch.client.transport.TransportClient.newPluginService(TransportClient.java:94)
	at org.elasticsearch.client.transport.TransportClient.buildTemplate(TransportClient.java:119)
	at org.elasticsearch.client.transport.TransportClient.<init>(TransportClient.java:247)
	at org.elasticsearch.transport.client.PreBuiltTransportClient.<init>(PreBuiltTransportClient.java:92)
	at org.elasticsearch.xpack.client.PreBuiltXPackTransportClient.<init>(PreBuiltXPackTransportClient.java:55)
	at org.elasticsearch.xpack.client.PreBuiltXPackTransportClient.<init>(PreBuiltXPackTransportClient.java:50)
	at org.elasticsearch.xpack.client.PreBuiltXPackTransportClient.<init>(PreBuiltXPackTransportClient.java:46)	

Suggested patch:

Index: plugin/hotswap-agent-log4j2-plugin/src/main/java/org/hotswap/agent/plugin/log4j2/Log4j2Plugin.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- plugin/hotswap-agent-log4j2-plugin/src/main/java/org/hotswap/agent/plugin/log4j2/Log4j2Plugin.java	(revision 4b7498df239e24f0fdbd2c0be2e795c6f6b0d670)
+++ plugin/hotswap-agent-log4j2-plugin/src/main/java/org/hotswap/agent/plugin/log4j2/Log4j2Plugin.java	(revision 06b8d95deaf6d2a3deacd9f05f4096f341c4084f)
@@ -59,6 +59,9 @@
 
             Object configurationSource = configurationClass.getDeclaredMethod("getConfigurationSource").invoke(config);
             String url = (String) configurationSourceClass.getDeclaredMethod("getLocation").invoke(configurationSource);
+            if (url == null) {
+                LOGGER.warning("Location url is NULL on configurationSource={} - exiting.", configurationSource);
+            }
             configURI = Paths.get(url).toUri();
 
             if (registeredURIs.contains(configURI)) {

[himanshumehta47]

Is it fixed yet? if yes can you please let me know which version of hotswap-agent.jar to use?