Package org.apache.accumulo.server

Class ServerUtil

java.lang.Object

org.apache.accumulo.server.ServerUtil

public class ServerUtil
extends Object

Constructor Summary

Constructors

Constructor	Description
ServerUtil()

Method Summary

Modifier and Type	Method	Description
static void	abortIfFateTransactions(ServerContext context)	Exit loudly if there are outstanding Fate operations.
static void	ensureDataVersionCompatible(int dataVersion)	Check to see if this version of Accumulo can run against or upgrade the passed in data version.
static org.apache.hadoop.fs.Path	getAccumuloInstanceIdPath(VolumeManager fs)
static int	getAccumuloPersistentVersion(Volume v)
static int	getAccumuloPersistentVersion(VolumeManager fs)
static int	getAccumuloPersistentVersion(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path path)
static void	init(ServerContext context, String application)
static void	monitorSwappiness(AccumuloConfiguration config)
static boolean	persistentVersionNeedsUpgrade(int accumuloPersistentVersion)	Does the data version number stored in the backing Volumes indicate we need to upgrade something?
static void	updateAccumuloVersion(VolumeManager fs, int oldVersion)
static void	waitForZookeeperAndHdfs(ServerContext context)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ServerUtil

public ServerUtil()

Method Detail

updateAccumuloVersion

public static void updateAccumuloVersion(VolumeManager fs,
                                         int oldVersion)

getAccumuloPersistentVersion

public static int getAccumuloPersistentVersion(org.apache.hadoop.fs.FileSystem fs,
                                               org.apache.hadoop.fs.Path path)

getAccumuloPersistentVersion

public static int getAccumuloPersistentVersion(Volume v)

getAccumuloPersistentVersion

public static int getAccumuloPersistentVersion(VolumeManager fs)

getAccumuloInstanceIdPath

public static org.apache.hadoop.fs.Path getAccumuloInstanceIdPath(VolumeManager fs)

init

public static void init(ServerContext context,
                        String application)

ensureDataVersionCompatible

public static void ensureDataVersionCompatible(int dataVersion)

Check to see if this version of Accumulo can run against or upgrade the passed in data version.

persistentVersionNeedsUpgrade

public static boolean persistentVersionNeedsUpgrade(int accumuloPersistentVersion)

Does the data version number stored in the backing Volumes indicate we need to upgrade something?

monitorSwappiness

public static void monitorSwappiness(AccumuloConfiguration config)

waitForZookeeperAndHdfs

public static void waitForZookeeperAndHdfs(ServerContext context)

abortIfFateTransactions

public static void abortIfFateTransactions(ServerContext context)

Exit loudly if there are outstanding Fate operations. Since Fate serializes class names, we need to make sure there are no queued transactions from a previous version before continuing an upgrade. The status of the operations is irrelevant; those in SUCCESSFUL status cause the same problem as those just queued. Note that the Master should not allow write access to Fate until after all upgrade steps are complete. Should be called as a guard before performing any upgrade steps, after determining that an upgrade is needed. see ACCUMULO-2519