[CORDA-1356]: OOM when using Demobench + Explorer (fix). (#3268)

docs/source/changelog.rst

@@ -7,6 +7,8 @@ release, see :doc:`upgrade-notes`.
 Unreleased
 ==========
 
+* Removed -xmx VM argument from Explorer's Capsule setup. This helps avoiding out of memory errors.
+
 * Shell now kills an ongoing flow when CTRL+C is pressed in the terminal.
 
 * ``ServiceHub`` and ``CordaRPCOps`` can now safely be used from multiple threads without incurring in database transaction problems.

tools/explorer/capsule/build.gradle

@@ -40,11 +40,9 @@ task buildExplorerJAR(type: FatCapsule, dependsOn: project(':tools:explorer').co
         caplets = ['ExplorerCaplet']
 
         // JVM configuration:
-        // - Constrain to small heap sizes to ease development on low end devices.
         // - Switch to the G1 GC which is going to be the default in Java 9 and gives low pause times/string dedup.
         //
-        // If you change these flags, please also update Driver.kt
-        jvmArgs = ['-Xmx512m', '-XX:+UseG1GC']
+        jvmArgs = ['-XX:+UseG1GC']
     }
 }