Index: oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/rdb/RDBDocumentSerializer.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/rdb/RDBDocumentSerializer.java	(date 1418628430000)
+++ oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/rdb/RDBDocumentSerializer.java	(date 1419415408000)
@@ -68,7 +68,7 @@
         sb.append("{");
         boolean needComma = false;
         for (String key : doc.keySet()) {
-            if (!columnProperties.contains(key)) {
+            if (columnProperties.contains(key)) {
                 if (needComma) {
                     sb.append(",");
                 }
Index: oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/rdb/RDBDocumentStore.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/rdb/RDBDocumentStore.java	(date 1418628430000)
+++ oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/rdb/RDBDocumentStore.java	(date 1419415408000)
@@ -434,9 +434,10 @@
                         + tableName
                         + " (ID varchar(512) not null primary key, MODIFIED bigint, HASBINARY smallint, MODCOUNT bigint, CMODCOUNT bigint, DSIZE bigint, DATA varchar(16384), BDATA blob)");
             } else if ("MySQL".equals(dbtype)) {
+                this.dataLimitInOctets = 12288 * 3;
                 stmt.execute("create table "
                         + tableName
-                        + " (ID varchar(512) not null primary key, MODIFIED bigint, HASBINARY smallint, MODCOUNT bigint, CMODCOUNT bigint, DSIZE bigint, DATA varchar(16384), BDATA mediumblob)");
+                        + " (ID varchar(190) not null primary key, MODIFIED bigint, HASBINARY smallint, MODCOUNT bigint, CMODCOUNT bigint, DSIZE bigint, DATA varchar(12288), BDATA mediumblob)");
             } else if ("Oracle".equals(dbtype)) {
                 // see https://issues.apache.org/jira/browse/OAK-1914
                 this.dataLimitInOctets = 4000;
@@ -916,11 +917,17 @@
                 Boolean hasBinary = flag == null ? false : flag.intValue() == NodeDocument.HAS_BINARY_VAL;
                 Long modcount = (Long) document.get(MODCOUNT);
                 Long cmodcount = (Long) document.get(COLLISIONSMODCOUNT);
-                dbInsert(connection, tableName, document.getId(), modified, hasBinary, modcount, cmodcount, data);
+                boolean result = dbInsert(connection, tableName, document.getId(), modified, hasBinary, modcount, cmodcount, data);
+                if (!result) {
+                    LOG.error("Error Id : " + data);
-            }
-            connection.commit();
+                }
+                connection.commit();
+            }
+/*
+            connection.commit();
+*/
         } catch (SQLException ex) {
-            LOG.debug("insert of " + ids + " failed", ex);
+            LOG.error("insert of " + ids + " failed", ex);
             this.ch.rollbackConnection(connection);
             throw new DocumentStoreException(ex);
         } finally {