From bb30abf774938e5f639b3efcf6d71fe0810342bb Mon Sep 17 00:00:00 2001
From: "Hiram R. Chirino" <chirino@apache.org>
Date: Mon, 3 Jun 2013 14:55:57 +0000
Subject: [PATCH] Try to avoid the 'short record at position' LevelDB error
 reported at:
 http://activemq.2283324.n4.nabble.com/Activemq-5-9-leveldb-replication-issue-tp4667495p4667674.html

git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@1489019 13f79535-47bb-0310-9956-ffa450edef68
---
 .../activemq/transport/amqp/IDERunner.java    | 36 +++++++++++++++++++
 .../apache/activemq/leveldb/RecordLog.scala   | 13 +++++--
 2 files changed, 47 insertions(+), 2 deletions(-)
 create mode 100644 activemq-amqp/src/test/java/org/apache/activemq/transport/amqp/IDERunner.java

diff --git a/activemq-amqp/src/test/java/org/apache/activemq/transport/amqp/IDERunner.java b/activemq-amqp/src/test/java/org/apache/activemq/transport/amqp/IDERunner.java
new file mode 100644
index 0000000000..4bd2c3ed9c
--- /dev/null
+++ b/activemq-amqp/src/test/java/org/apache/activemq/transport/amqp/IDERunner.java
@@ -0,0 +1,36 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.activemq.transport.amqp;
+
+import org.apache.activemq.broker.BrokerService;
+import org.apache.activemq.leveldb.LevelDBStore;
+
+import java.io.File;
+
+public class IDERunner {
+
+    public static void main(String[]args) throws Exception {
+        BrokerService bs = new BrokerService();
+        bs.addConnector("tcp://localhost:61616");
+        LevelDBStore store = new LevelDBStore();
+        store.setDirectory(new File("target/activemq-data/haleveldb"));
+        bs.setPersistenceAdapter(store);
+        bs.deleteAllMessages();
+        bs.start();
+        bs.waitUntilStopped();
+    }
+}
diff --git a/activemq-leveldb-store/src/main/scala/org/apache/activemq/leveldb/RecordLog.scala b/activemq-leveldb-store/src/main/scala/org/apache/activemq/leveldb/RecordLog.scala
index 70adc724e8..0154232fee 100644
--- a/activemq-leveldb-store/src/main/scala/org/apache/activemq/leveldb/RecordLog.scala
+++ b/activemq-leveldb-store/src/main/scala/org/apache/activemq/leveldb/RecordLog.scala
@@ -283,8 +283,17 @@ case class RecordLog(directory: File, logSuffix:String) {
         data
       } else {
         val data = new Buffer(length)
-        if( channel.read(data.toByteBuffer, offset+LOG_HEADER_SIZE) != data.length ) {
-          throw new IOException("short record at position: "+record_position+" in file: "+file+", offset: "+offset)
+        var bb = data.toByteBuffer
+        var position = offset+LOG_HEADER_SIZE
+        while( bb.hasRemaining  ) {
+          var count = channel.read(bb, position)
+          if( count == 0 ) {
+            throw new IOException("zero read at file '%s' offset: %d".format(file, position))
+          }
+          if( count < 0 ) {
+            throw new EOFException("File '%s' offset: %d".format(file, position))
+          }
+          position += count
         }
         data
       }