Apache
/
hadoop
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

HDFS-4080. Add a separate logger for block state change logs to enable turning off those logs. Contributed by Kihwal Lee. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1407566 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Suresh Srinivas 2012-11-09 18:07:04 +00:00
parent c7ab9779d2
commit db71de2e11
11 changed files with 74 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
hadoop-common-project/hadoop-common/src/main/conf/log4j.properties
View File

@ -99,6 +99,13 @@ log4j.appender.TLA.totalLogFileSize=${hadoop.tasklog.totalLogFileSize}
log4j.appender.TLA.layout=org.apache.log4j.PatternLayout
log4j.appender.TLA.layout.ConversionPattern=%d{ISO8601} %p %c: %m%n
#
# HDFS block state change log from block manager
#
# Uncomment the following to suppress normal block state change
# messages from BlockManager in NameNode.
#log4j.logger.BlockStateChange=WARN
#
#Security appender
#

2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
View File

@ -1961,6 +1961,8 @@ Release 0.23.5 - UNRELEASED
NEW FEATURES
IMPROVEMENTS
HDFS-4080. Add a separate logger for block state change logs to enable turning
off those logs. (Kihwal Lee via suresh)
OPTIMIZATIONS

4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfoUnderConstruction.java
View File

@ -233,7 +233,7 @@ public class BlockInfoUnderConstruction extends BlockInfo {
setBlockUCState(BlockUCState.UNDER_RECOVERY);
blockRecoveryId = recoveryId;
if (replicas.size() == 0) {
NameNode.stateChangeLog.warn("BLOCK*"
NameNode.blockStateChangeLog.warn("BLOCK*"
+ " BlockInfoUnderConstruction.initLeaseRecovery:"
+ " No blocks found, lease removed.");
}
@ -245,7 +245,7 @@ public class BlockInfoUnderConstruction extends BlockInfo {
primaryNodeIndex = j;
DatanodeDescriptor primary = replicas.get(j).getExpectedLocation();
primary.addBlockToBeRecovered(this);
NameNode.stateChangeLog.info("BLOCK* " + this
NameNode.blockStateChangeLog.info("BLOCK* " + this
+ " recovery started, primary=" + primary);
return;
}

87
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
View File

@ -83,6 +83,7 @@ import com.google.common.collect.Sets;
public class BlockManager {
static final Log LOG = LogFactory.getLog(BlockManager.class);
static final Log blockLog = NameNode.blockStateChangeLog;
/** Default load factor of map */
public static final float DEFAULT_MAP_LOAD_FACTOR = 0.75f;
@ -872,7 +873,7 @@ public class BlockManager {
final long size) throws UnregisteredNodeException {
final DatanodeDescriptor node = getDatanodeManager().getDatanode(datanode);
if (node == null) {
NameNode.stateChangeLog.warn("BLOCK* getBlocks: "
blockLog.warn("BLOCK* getBlocks: "
+ "Asking for blocks from an unrecorded node " + datanode);
throw new HadoopIllegalArgumentException(
"Datanode " + datanode + " not found.");
@ -950,7 +951,7 @@ public class BlockManager {
datanodes.append(node).append(" ");
}
if (datanodes.length() != 0) {
NameNode.stateChangeLog.info("BLOCK* addToInvalidates: " + b + " "
blockLog.info("BLOCK* addToInvalidates: " + b + " "
+ datanodes);
}
}
@ -971,7 +972,7 @@ public class BlockManager {
// ignore the request for now. This could happen when BlockScanner
// thread of Datanode reports bad block before Block reports are sent
// by the Datanode on startup
NameNode.stateChangeLog.info("BLOCK* findAndMarkBlockAsCorrupt: "
blockLog.info("BLOCK* findAndMarkBlockAsCorrupt: "
+ blk + " not found");
return;
}
@ -988,7 +989,7 @@ public class BlockManager {
BlockCollection bc = b.corrupted.getBlockCollection();
if (bc == null) {
NameNode.stateChangeLog.info("BLOCK markBlockAsCorrupt: " + b
blockLog.info("BLOCK markBlockAsCorrupt: " + b
+ " cannot be marked as corrupt as it does not belong to any file");
addToInvalidates(b.corrupted, node);
return;
@ -1013,7 +1014,7 @@ public class BlockManager {
*/
private void invalidateBlock(BlockToMarkCorrupt b, DatanodeInfo dn
) throws IOException {
NameNode.stateChangeLog.info("BLOCK* invalidateBlock: " + b + " on " + dn);
blockLog.info("BLOCK* invalidateBlock: " + b + " on " + dn);
DatanodeDescriptor node = getDatanodeManager().getDatanode(dn);
if (node == null) {
throw new IOException("Cannot invalidate " + b
@ -1023,7 +1024,7 @@ public class BlockManager {
// Check how many copies we have of the block
NumberReplicas nr = countNodes(b.stored);
if (nr.replicasOnStaleNodes() > 0) {
NameNode.stateChangeLog.info("BLOCK* invalidateBlocks: postponing " +
blockLog.info("BLOCK* invalidateBlocks: postponing " +
"invalidation of " + b + " on " + dn + " because " +
nr.replicasOnStaleNodes() + " replica(s) are located on nodes " +
"with potentially out-of-date block reports");
@ -1033,12 +1034,12 @@ public class BlockManager {
// If we have at least one copy on a live node, then we can delete it.
addToInvalidates(b.corrupted, dn);
removeStoredBlock(b.stored, node);
if(NameNode.stateChangeLog.isDebugEnabled()) {
NameNode.stateChangeLog.debug("BLOCK* invalidateBlocks: "
if(blockLog.isDebugEnabled()) {
blockLog.debug("BLOCK* invalidateBlocks: "
+ b + " on " + dn + " listed for deletion.");
}
} else {
NameNode.stateChangeLog.info("BLOCK* invalidateBlocks: " + b
blockLog.info("BLOCK* invalidateBlocks: " + b
+ " on " + dn + " is the only copy and was not deleted");
}
}
@ -1160,7 +1161,7 @@ public class BlockManager {
(blockHasEnoughRacks(block)) ) {
neededReplications.remove(block, priority); // remove from neededReplications
neededReplications.decrementReplicationIndex(priority);
NameNode.stateChangeLog.info("BLOCK* Removing " + block
blockLog.info("BLOCK* Removing " + block
+ " from neededReplications as it has enough replicas");
continue;
}
@ -1235,7 +1236,7 @@ public class BlockManager {
neededReplications.remove(block, priority); // remove from neededReplications
neededReplications.decrementReplicationIndex(priority);
rw.targets = null;
NameNode.stateChangeLog.info("BLOCK* Removing " + block
blockLog.info("BLOCK* Removing " + block
+ " from neededReplications as it has enough replicas");
continue;
}
@ -1261,8 +1262,8 @@ public class BlockManager {
// The reason we use 'pending' is so we can retry
// replications that fail after an appropriate amount of time.
pendingReplications.increment(block, targets.length);
if(NameNode.stateChangeLog.isDebugEnabled()) {
NameNode.stateChangeLog.debug(
if(blockLog.isDebugEnabled()) {
blockLog.debug(
"BLOCK* block " + block
+ " is moved from neededReplications to pendingReplications");
}
@ -1278,7 +1279,7 @@ public class BlockManager {
namesystem.writeUnlock();
}
if (NameNode.stateChangeLog.isInfoEnabled()) {
if (blockLog.isInfoEnabled()) {
// log which blocks have been scheduled for replication
for(ReplicationWork rw : work){
DatanodeDescriptor[] targets = rw.targets;
@ -1288,13 +1289,13 @@ public class BlockManager {
targetList.append(' ');
targetList.append(targets[k]);
}
NameNode.stateChangeLog.info("BLOCK* ask " + rw.srcNode
blockLog.info("BLOCK* ask " + rw.srcNode
+ " to replicate " + rw.block + " to " + targetList);
}
}
}
if(NameNode.stateChangeLog.isDebugEnabled()) {
NameNode.stateChangeLog.debug(
if(blockLog.isDebugEnabled()) {
blockLog.debug(
"BLOCK* neededReplications = " + neededReplications.size()
+ " pendingReplications = " + pendingReplications.size());
}
@ -1504,7 +1505,7 @@ public class BlockManager {
// To minimize startup time, we discard any second (or later) block reports
// that we receive while still in startup phase.
if (namesystem.isInStartupSafeMode() && !node.isFirstBlockReport()) {
NameNode.stateChangeLog.info("BLOCK* processReport: "
blockLog.info("BLOCK* processReport: "
+ "discarded non-initial block report from " + nodeID
+ " because namenode still in startup phase");
return;
@ -1536,7 +1537,7 @@ public class BlockManager {
// Log the block report processing stats from Namenode perspective
NameNode.getNameNodeMetrics().addBlockReport((int) (endTime - startTime));
NameNode.stateChangeLog.info("BLOCK* processReport: from "
blockLog.info("BLOCK* processReport: from "
+ nodeID + ", blocks: " + newReport.getNumberOfBlocks()
+ ", processing time: " + (endTime - startTime) + " msecs");
}
@ -1596,7 +1597,7 @@ public class BlockManager {
addStoredBlock(b, node, null, true);
}
for (Block b : toInvalidate) {
NameNode.stateChangeLog.info("BLOCK* processReport: "
blockLog.info("BLOCK* processReport: "
+ b + " on " + node + " size " + b.getNumBytes()
+ " does not belong to any file");
addToInvalidates(b, node);
@ -2034,7 +2035,7 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
}
if (storedBlock == null || storedBlock.getBlockCollection() == null) {
// If this block does not belong to anyfile, then we are done.
NameNode.stateChangeLog.info("BLOCK* addStoredBlock: " + block + " on "
blockLog.info("BLOCK* addStoredBlock: " + block + " on "
+ node + " size " + block.getNumBytes()
+ " but it does not belong to any file");
// we could add this block to invalidate set of this datanode.
@ -2056,7 +2057,7 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
}
} else {
curReplicaDelta = 0;
NameNode.stateChangeLog.warn("BLOCK* addStoredBlock: "
blockLog.warn("BLOCK* addStoredBlock: "
+ "Redundant addStoredBlock request received for " + storedBlock
+ " on " + node + " size " + storedBlock.getNumBytes());
}
@ -2115,7 +2116,7 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
}
private void logAddStoredBlock(BlockInfo storedBlock, DatanodeDescriptor node) {
if (!NameNode.stateChangeLog.isInfoEnabled()) {
if (!blockLog.isInfoEnabled()) {
return;
}
@ -2126,7 +2127,7 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
storedBlock.appendStringTo(sb);
sb.append(" size " )
.append(storedBlock.getNumBytes());
NameNode.stateChangeLog.info(sb);
blockLog.info(sb);
}
/**
* Invalidate corrupt replicas.
@ -2153,7 +2154,7 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
try {
invalidateBlock(new BlockToMarkCorrupt(blk, null), node);
} catch (IOException e) {
NameNode.stateChangeLog.info("invalidateCorruptReplicas "
blockLog.info("invalidateCorruptReplicas "
+ "error in deleting bad block " + blk + " on " + node, e);
gotException = true;
}
@ -2391,7 +2392,7 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
// upon giving instructions to the namenode.
//
addToInvalidates(b, cur);
NameNode.stateChangeLog.info("BLOCK* chooseExcessReplicates: "
blockLog.info("BLOCK* chooseExcessReplicates: "
+"("+cur+", "+b+") is added to invalidated blocks set");
}
}
@ -2405,8 +2406,8 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
}
if (excessBlocks.add(block)) {
excessBlocksCount++;
if(NameNode.stateChangeLog.isDebugEnabled()) {
NameNode.stateChangeLog.debug("BLOCK* addToExcessReplicate:"
if(blockLog.isDebugEnabled()) {
blockLog.debug("BLOCK* addToExcessReplicate:"
+ " (" + dn + ", " + block
+ ") is added to excessReplicateMap");
}
@ -2418,15 +2419,15 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
* removed block is still valid.
*/
public void removeStoredBlock(Block block, DatanodeDescriptor node) {
if(NameNode.stateChangeLog.isDebugEnabled()) {
NameNode.stateChangeLog.debug("BLOCK* removeStoredBlock: "
if(blockLog.isDebugEnabled()) {
blockLog.debug("BLOCK* removeStoredBlock: "
+ block + " from " + node);
}
assert (namesystem.hasWriteLock());
{
if (!blocksMap.removeNode(block, node)) {
if(NameNode.stateChangeLog.isDebugEnabled()) {
NameNode.stateChangeLog.debug("BLOCK* removeStoredBlock: "
if(blockLog.isDebugEnabled()) {
blockLog.debug("BLOCK* removeStoredBlock: "
+ block + " has already been removed from node " + node);
}
return;
@ -2453,8 +2454,8 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
if (excessBlocks != null) {
if (excessBlocks.remove(block)) {
excessBlocksCount--;
if(NameNode.stateChangeLog.isDebugEnabled()) {
NameNode.stateChangeLog.debug("BLOCK* removeStoredBlock: "
if(blockLog.isDebugEnabled()) {
blockLog.debug("BLOCK* removeStoredBlock: "
+ block + " is removed from excessBlocks");
}
if (excessBlocks.size() == 0) {
@ -2497,7 +2498,7 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
if (delHint != null && delHint.length() != 0) {
delHintNode = datanodeManager.getDatanode(delHint);
if (delHintNode == null) {
NameNode.stateChangeLog.warn("BLOCK* blockReceived: " + block
blockLog.warn("BLOCK* blockReceived: " + block
+ " is expected to be removed from an unrecorded node " + delHint);
}
}
@ -2532,7 +2533,7 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
addStoredBlock(b, node, delHintNode, true);
}
for (Block b : toInvalidate) {
NameNode.stateChangeLog.info("BLOCK* addBlock: block "
blockLog.info("BLOCK* addBlock: block "
+ b + " on " + node + " size " + b.getNumBytes()
+ " does not belong to any file");
addToInvalidates(b, node);
@ -2558,7 +2559,7 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
try {
final DatanodeDescriptor node = datanodeManager.getDatanode(nodeID);
if (node == null || !node.isAlive) {
NameNode.stateChangeLog
blockLog
.warn("BLOCK* processIncrementalBlockReport"
+ " is received from dead or unregistered node "
+ nodeID);
@ -2585,19 +2586,19 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
String msg =
"Unknown block status code reported by " + nodeID +
": " + rdbi;
NameNode.stateChangeLog.warn(msg);
blockLog.warn(msg);
assert false : msg; // if assertions are enabled, throw.
break;
}
if (NameNode.stateChangeLog.isDebugEnabled()) {
NameNode.stateChangeLog.debug("BLOCK* block "
if (blockLog.isDebugEnabled()) {
blockLog.debug("BLOCK* block "
+ (rdbi.getStatus()) + ": " + rdbi.getBlock()
+ " is received from " + nodeID);
}
}
} finally {
namesystem.writeUnlock();
NameNode.stateChangeLog
blockLog
.debug("*BLOCK* NameNode.processIncrementalBlockReport: " + "from "
+ nodeID
+ " receiving: " + receiving + ", "
@ -2890,8 +2891,8 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
} finally {
namesystem.writeUnlock();
}
if (NameNode.stateChangeLog.isInfoEnabled()) {
NameNode.stateChangeLog.info("BLOCK* " + getClass().getSimpleName()
if (blockLog.isInfoEnabled()) {
blockLog.info("BLOCK* " + getClass().getSimpleName()
+ ": ask " + dn + " to delete " + toInvalidate);
}
return toInvalidate.size();

4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/CorruptReplicasMap.java
View File

@ -63,13 +63,13 @@ public class CorruptReplicasMap{
if (!nodes.contains(dn)) {
nodes.add(dn);
NameNode.stateChangeLog.info("BLOCK NameSystem.addToCorruptReplicasMap: "+
NameNode.blockStateChangeLog.info("BLOCK NameSystem.addToCorruptReplicasMap: "+
blk.getBlockName() +
" added as corrupt on " + dn +
" by " + Server.getRemoteIp() +
reasonText);
} else {
NameNode.stateChangeLog.info("BLOCK NameSystem.addToCorruptReplicasMap: "+
NameNode.blockStateChangeLog.info("BLOCK NameSystem.addToCorruptReplicasMap: "+
"duplicate requested for " +
blk.getBlockName() + " to add as corrupt " +
"on " + dn +

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/InvalidateBlocks.java
View File

@ -86,7 +86,7 @@ class InvalidateBlocks {
if (set.add(block)) {
numBlocks++;
if (log) {
NameNode.stateChangeLog.info("BLOCK* " + getClass().getSimpleName()
NameNode.blockStateChangeLog.info("BLOCK* " + getClass().getSimpleName()
+ ": add " + block + " to " + datanode);
}
}

16
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/UnderReplicatedBlocks.java
View File

@ -190,8 +190,8 @@ class UnderReplicatedBlocks implements Iterable<Block> {
int priLevel = getPriority(block, curReplicas, decomissionedReplicas,
expectedReplicas);
if(priorityQueues.get(priLevel).add(block)) {
if(NameNode.stateChangeLog.isDebugEnabled()) {
NameNode.stateChangeLog.debug(
if(NameNode.blockStateChangeLog.isDebugEnabled()) {
NameNode.blockStateChangeLog.debug(
"BLOCK* NameSystem.UnderReplicationBlock.add:"
+ block
+ " has only " + curReplicas
@ -233,8 +233,8 @@ class UnderReplicatedBlocks implements Iterable<Block> {
boolean remove(Block block, int priLevel) {
if(priLevel >= 0 && priLevel < LEVEL
&& priorityQueues.get(priLevel).remove(block)) {
if(NameNode.stateChangeLog.isDebugEnabled()) {
NameNode.stateChangeLog.debug(
if(NameNode.blockStateChangeLog.isDebugEnabled()) {
NameNode.blockStateChangeLog.debug(
"BLOCK* NameSystem.UnderReplicationBlock.remove: "
+ "Removing block " + block
+ " from priority queue "+ priLevel);
@ -245,8 +245,8 @@ class UnderReplicatedBlocks implements Iterable<Block> {
// not found in the queue for the given priority level.
for (int i = 0; i < LEVEL; i++) {
if (priorityQueues.get(i).remove(block)) {
if(NameNode.stateChangeLog.isDebugEnabled()) {
NameNode.stateChangeLog.debug(
if(NameNode.blockStateChangeLog.isDebugEnabled()) {
NameNode.blockStateChangeLog.debug(
"BLOCK* NameSystem.UnderReplicationBlock.remove: "
+ "Removing block " + block
+ " from priority queue "+ i);
@ -296,8 +296,8 @@ class UnderReplicatedBlocks implements Iterable<Block> {
remove(block, oldPri);
}
if(priorityQueues.get(curPri).add(block)) {
if(NameNode.stateChangeLog.isDebugEnabled()) {
NameNode.stateChangeLog.debug(
if(NameNode.blockStateChangeLog.isDebugEnabled()) {
NameNode.blockStateChangeLog.debug(
"BLOCK* NameSystem.UnderReplicationBlock.update:"
+ block
+ " has only "+ curReplicas

1
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNode.java
View File

@ -227,6 +227,7 @@ public class NameNode {
public static final int DEFAULT_PORT = 8020;
public static final Log LOG = LogFactory.getLog(NameNode.class.getName());
public static final Log stateChangeLog = LogFactory.getLog("org.apache.hadoop.hdfs.StateChange");
public static final Log blockStateChangeLog = LogFactory.getLog("BlockStateChange");
public static final HAState ACTIVE_STATE = new ActiveState();
public static final HAState STANDBY_STATE = new StandbyState();

9
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java
View File

@ -132,6 +132,7 @@ class NameNodeRpcServer implements NamenodeProtocols {
private static final Log LOG = NameNode.LOG;
private static final Log stateChangeLog = NameNode.stateChangeLog;
private static final Log blockStateChangeLog = NameNode.blockStateChangeLog;
// Dependencies from other parts of NN.
protected final FSNamesystem namesystem;
@ -889,8 +890,8 @@ class NameNodeRpcServer implements NamenodeProtocols {
String poolId, StorageBlockReport[] reports) throws IOException {
verifyRequest(nodeReg);
BlockListAsLongs blist = new BlockListAsLongs(reports[0].getBlocks());
if(stateChangeLog.isDebugEnabled()) {
stateChangeLog.debug("*BLOCK* NameNode.blockReport: "
if(blockStateChangeLog.isDebugEnabled()) {
blockStateChangeLog.debug("*BLOCK* NameNode.blockReport: "
+ "from " + nodeReg + " " + blist.getNumberOfBlocks()
+ " blocks");
}
@ -905,8 +906,8 @@ class NameNodeRpcServer implements NamenodeProtocols {
public void blockReceivedAndDeleted(DatanodeRegistration nodeReg, String poolId,
StorageReceivedDeletedBlocks[] receivedAndDeletedBlocks) throws IOException {
verifyRequest(nodeReg);
if(stateChangeLog.isDebugEnabled()) {
stateChangeLog.debug("*BLOCK* NameNode.blockReceivedAndDeleted: "
if(blockStateChangeLog.isDebugEnabled()) {
blockStateChangeLog.debug("*BLOCK* NameNode.blockReceivedAndDeleted: "
+"from "+nodeReg+" "+receivedAndDeletedBlocks.length
+" blocks.");
}

1
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDatanodeDeath.java
View File

@ -46,6 +46,7 @@ import org.junit.Test;
public class TestDatanodeDeath {
{
((Log4JLogger)NameNode.stateChangeLog).getLogger().setLevel(Level.ALL);
((Log4JLogger)NameNode.blockStateChangeLog).getLogger().setLevel(Level.ALL);
((Log4JLogger)LeaseManager.LOG).getLogger().setLevel(Level.ALL);
((Log4JLogger)LogFactory.getLog(FSNamesystem.class)).getLogger().setLevel(Level.ALL);
((Log4JLogger)DataNode.LOG).getLogger().setLevel(Level.ALL);

1
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestFileAppend2.java
View File

@ -51,6 +51,7 @@ public class TestFileAppend2 {
{
((Log4JLogger)NameNode.stateChangeLog).getLogger().setLevel(Level.ALL);
((Log4JLogger)NameNode.blockStateChangeLog).getLogger().setLevel(Level.ALL);
((Log4JLogger)LeaseManager.LOG).getLogger().setLevel(Level.ALL);
((Log4JLogger)LogFactory.getLog(FSNamesystem.class)).getLogger().setLevel(Level.ALL);
((Log4JLogger)DataNode.LOG).getLogger().setLevel(Level.ALL);