diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java b/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java
index 6a7d1b76..7d300b5a 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/LaunchServer.java
@@ -165,6 +165,10 @@ public void verify() {
             if (env == null) {
                 throw new NullPointerException("Env must not be null");
             }
+            if(netty == null)
+            {
+                throw new NullPointerException("Netty must not be null");
+            }
         }
     }
 
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/auth/MySQLSourceConfig.java b/LaunchServer/src/main/java/ru/gravit/launchserver/auth/MySQLSourceConfig.java
index 95c16c79..fccb3b40 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/auth/MySQLSourceConfig.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/auth/MySQLSourceConfig.java
@@ -89,9 +89,9 @@ public synchronized Connection getConnection() throws SQLException {
                 // Set HikariCP pool
                 // Replace source with hds
                 source = new HikariDataSource(cfg);
-                LogHelper.info("HikariCP pooling enabled for '%s'", poolName);
+                LogHelper.warning("HikariCP pooling enabled for '%s'", poolName);
             } catch (ClassNotFoundException ignored) {
-                LogHelper.warning("HikariCP isn't in classpath for '%s'", poolName);
+                LogHelper.debug("HikariCP isn't in classpath for '%s'", poolName);
             }
         }
         return source.getConnection();
diff --git a/Launcher/src/main/java/ru/gravit/launcher/ClientLauncherWrapper.java b/Launcher/src/main/java/ru/gravit/launcher/ClientLauncherWrapper.java
index 3f86f331..3c2d9df1 100644
--- a/Launcher/src/main/java/ru/gravit/launcher/ClientLauncherWrapper.java
+++ b/Launcher/src/main/java/ru/gravit/launcher/ClientLauncherWrapper.java
@@ -44,9 +44,9 @@ public static void main(String[] arguments) throws IOException, InterruptedExcep
             if (!process.isAlive()) {
                 int errorcode = process.exitValue();
                 if (errorcode != 0)
-                    LogHelper.error("Process exitwith error code: %d", errorcode);
+                    LogHelper.error("Process exit with error code: %d", errorcode);
                 else
-                    LogHelper.info("Process exitwith code 0");
+                    LogHelper.info("Process exit with code 0");
             } else {
                 LogHelper.debug("Process started success");
             }
diff --git a/libLauncher/src/main/java/ru/gravit/launcher/profiles/ClientProfile.java b/libLauncher/src/main/java/ru/gravit/launcher/profiles/ClientProfile.java
index 8de9245a..9d533337 100644
--- a/libLauncher/src/main/java/ru/gravit/launcher/profiles/ClientProfile.java
+++ b/libLauncher/src/main/java/ru/gravit/launcher/profiles/ClientProfile.java
@@ -391,6 +391,24 @@ public void verify() {
 
         // Client launcher
         VerifyHelper.verify(getTitle(), VerifyHelper.NOT_EMPTY, "Main class can't be empty");
+        for(String s : classPath)
+        {
+            if(s == null) throw new IllegalArgumentException("Found null entry in classPath");
+        }
+        for(String s : jvmArgs)
+        {
+            if(s == null) throw new IllegalArgumentException("Found null entry in jvmArgs");
+        }
+        for(String s : clientArgs)
+        {
+            if(s == null) throw new IllegalArgumentException("Found null entry in clientArgs");
+        }
+        for(OptionalFile f : updateOptional)
+        {
+            if(f == null) throw new IllegalArgumentException("Found null entry in updateOptional");
+            if(f.name == null) throw new IllegalArgumentException("Optional: name must not be null");
+            if(f.list == null) throw new IllegalArgumentException("Optional: list must not be null");
+        }
     }
 
     @Override