Accumulo is based on Apache Accumulo 1.5.1, and includes the following patches:
ACCUMULO-1936: SimpleTest test cases occasionally fail
ACCUMULO-2005: Provide a scaling factor for mapred.task.timeout inside functional test's RunTests.java
ACCUMULO-2270: Bulk import thread pool initialized in non-static method.
ACCUMULO-2404: Main.main can log cleaner messages when underlying process has errors
ACCUMULO-2408: Metadata table not assigned after root table is loaded
ACCUMULO-2411: Remove warnings in 1.5 branch
ACCUMULO-2422: Backup master can miss acquiring lock when primary exits
ACCUMULO-2425: ConcurrentModificationException in master at startup
ACCUMULO-2428: Improper handling of rename in root tablet file management
ACCUMULO-2433: ShellServerTest still fails occasionally
ACCUMULO-2438: Deleting all table rows caused tablet load failure
ACCUMULO-2447: Shell#printHelp should use the ConsoleReader to print
ACCUMULO-2453: NoClassDefFound building against Hadoop1 in ShellServerTest
ACCUMULO-2489: NPE in split tablet
ACCUMULO-2512: MAC stop should waitFor processes
ACCUMULO-2617: LocationByProgram incorrectly computes JAVA_HOME
