commit b954a8d4632dc62fa0fb89186a977d7eaee7366e
author Srimanth Gunturi <sgunturi@hortonworks.com> Tue Nov 12 17:37:02 2013 -0800
committer Srimanth Gunturi <sgunturi@hortonworks.com> Tue Nov 12 17:45:56 2013 -0800
tree 7c787634acec7de5413dc7e252a869522e0d5fce
parent ef5b0aca6870cf6bd28f6fd5b6d3304831b92767

AMBARI-3752. MR jobs are hanging on a 2-node cluster with default configuration. Fixing missed memory. (srimanth)

ambari-web/app/utils/configs/defaults_providers/yarn_defaults_provider.js

diff --git a/ambari-web/app/utils/configs/defaults_providers/yarn_defaults_provider.js b/ambari-web/app/utils/configs/defaults_providers/yarn_defaults_provider.js
index c12a300..4950b6b 100644
--- a/ambari-web/app/utils/configs/defaults_providers/yarn_defaults_provider.js
+++ b/ambari-web/app/utils/configs/defaults_providers/yarn_defaults_provider.js
@@ -100,8 +100,12 @@
     if (this.get('clusterData.hBaseInstalled')) {
       ram -= this.get('hBaseRam')
     }
-    if (ram < 1) {
-      ram = 1;
+    // On low memory systems, memory left over after
+    // removing reserved-RAM and HBase might be
+    // less than 2GB (even negative). If so, we force
+    // a 2GB value relying on virtual memory.
+    if (ram < 2) {
+      ram = 2;
     }
     ram *= this.get('GB');
     ram /= containerSize;