diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/NettyHBaseSaslRpcClient.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/NettyHBaseSaslRpcClient.java
index a4ddd621424..6771e328516 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/NettyHBaseSaslRpcClient.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/NettyHBaseSaslRpcClient.java
@@ -45,10 +45,7 @@ public class NettyHBaseSaslRpcClient extends AbstractHBaseSaslRpcClient {
 
   public void setupSaslHandler(ChannelPipeline p) {
     String qop = (String) saslClient.getNegotiatedProperty(Sasl.QOP);
-    if (LOG.isDebugEnabled()) {
-      LOG.debug("SASL client context established. Negotiated QoP: " + qop);
-    }
-
+    LOG.trace("SASL client context established. Negotiated QoP {}", qop);
     if (qop == null || "auth".equalsIgnoreCase(qop)) {
       return;
     }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/NettyHBaseSaslRpcClientHandler.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/NettyHBaseSaslRpcClientHandler.java
index afc15ab4e3d..8da3fdef52b 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/NettyHBaseSaslRpcClientHandler.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/NettyHBaseSaslRpcClientHandler.java
@@ -71,9 +71,7 @@ public class NettyHBaseSaslRpcClientHandler extends SimpleChannelInboundHandler<
   }
 
   private void writeResponse(ChannelHandlerContext ctx, byte[] response) {
-    if (LOG.isDebugEnabled()) {
-      LOG.debug("Will send token of size " + response.length + " from initSASLContext.");
-    }
+    LOG.trace("Sending token size={} from initSASLContext.", response.length);
     ctx.writeAndFlush(
       ctx.alloc().buffer(4 + response.length).writeInt(response.length).writeBytes(response));
   }
@@ -133,9 +131,7 @@ public class NettyHBaseSaslRpcClientHandler extends SimpleChannelInboundHandler<
       }
       return;
     }
-    if (LOG.isDebugEnabled()) {
-      LOG.debug("Will read input token of size " + len + " for processing by initSASLContext");
-    }
+    LOG.trace("Reading input token size={} for processing by initSASLContext", len);
     final byte[] challenge = new byte[len];
     msg.readBytes(challenge);
     byte[] response = ugi.doAs(new PrivilegedExceptionAction<byte[]>() {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignProcedure.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignProcedure.java
index 768f32bd1cc..86f0a3ff591 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignProcedure.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignProcedure.java
@@ -291,8 +291,11 @@ public class AssignProcedure extends RegionTransitionProcedure {
               " transition openSeqNum=" + openSeqNum + ", " + regionNode);
         }
         if (openSeqNum < regionNode.getOpenSeqNum()) {
-          LOG.warn("Skipping update of open seqnum with " + openSeqNum +
-              " because current seqnum=" + regionNode.getOpenSeqNum());
+          // Don't bother logging if openSeqNum == 0
+          if (openSeqNum != 0) {
+            LOG.warn("Skipping update of open seqnum with " + openSeqNum +
+                " because current seqnum=" + regionNode.getOpenSeqNum());
+          }
         } else {
           regionNode.setOpenSeqNum(openSeqNum);
         }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/RegionLocationFinder.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/RegionLocationFinder.java
index 07e9600e5bb..fb7731fa756 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/RegionLocationFinder.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/RegionLocationFinder.java
@@ -220,8 +220,7 @@ class RegionLocationFinder {
         tableDescriptor = this.services.getTableDescriptors().get(tableName);
       }
     } catch (FileNotFoundException fnfe) {
-      LOG.debug("FileNotFoundException during getTableDescriptors." + " Current table name = "
-          + tableName, fnfe);
+      LOG.debug("tableName={}", tableName, fnfe);
     }
 
     return tableDescriptor;
@@ -277,8 +276,7 @@ class RegionLocationFinder {
         blockDistbn = cache.get(hri);
         return blockDistbn;
       } else {
-        LOG.debug("HDFSBlocksDistribution not found in cache for region "
-            + hri.getRegionNameAsString());
+        LOG.trace("HDFSBlocksDistribution not found in cache for {}", hri.getRegionNameAsString());
         blockDistbn = internalGetTopBlockLocation(hri);
         cache.put(hri, blockDistbn);
         return blockDistbn;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/CleanerChore.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/CleanerChore.java
index bcb23ac29e6..cb202c82ff4 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/CleanerChore.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/CleanerChore.java
@@ -272,13 +272,9 @@ public abstract class CleanerChore<T extends FileCleanerDelegate> extends Schedu
       try {
         POOL.latchCountUp();
         if (runCleaner()) {
-          if (LOG.isTraceEnabled()) {
-            LOG.trace("Cleaned all WALs under {}", oldFileDir);
-          }
+          LOG.trace("Cleaned all WALs under {}", oldFileDir);
         } else {
-          if (LOG.isTraceEnabled()) {
-            LOG.trace("WALs outstanding under {}", oldFileDir);
-          }
+          LOG.trace("WALs outstanding under {}", oldFileDir);
         }
       } finally {
         POOL.latchCountDown();
@@ -291,9 +287,7 @@ public abstract class CleanerChore<T extends FileCleanerDelegate> extends Schedu
         POOL.updatePool((long) (0.8 * getTimeUnit().toMillis(getPeriod())));
       }
     } else {
-      if (LOG.isTraceEnabled()) {
-        LOG.trace("Cleaner chore disabled! Not cleaning.");
-      }
+      LOG.trace("Cleaner chore disabled! Not cleaning.");
     }
   }
 
@@ -472,7 +466,7 @@ public abstract class CleanerChore<T extends FileCleanerDelegate> extends Schedu
 
     @Override
     protected Boolean compute() {
-      LOG.debug("Cleaning under {}", dir);
+      LOG.trace("Cleaning under {}", dir);
       List<FileStatus> subDirs;
       List<FileStatus> files;
       try {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/HFileCleaner.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/HFileCleaner.java
index b85b56963b6..a5e87ae0eb9 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/HFileCleaner.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/HFileCleaner.java
@@ -235,7 +235,7 @@ public class HFileCleaner extends CleanerChore<BaseHFileCleanerDelegate> {
           break;
         }
         if (task != null) {
-          LOG.debug("Removing {}", task.filePath);
+          LOG.trace("Removing {}", task.filePath);
           boolean succeed;
           try {
             succeed = this.fs.delete(task.filePath, false);
@@ -258,13 +258,13 @@ public class HFileCleaner extends CleanerChore<BaseHFileCleanerDelegate> {
   private void countDeletedFiles(boolean isLargeFile, boolean fromLargeQueue) {
     if (isLargeFile) {
       if (deletedLargeFiles.get() == Long.MAX_VALUE) {
-        LOG.info("Deleted more than Long.MAX_VALUE large files, reset counter to 0");
+        LOG.debug("Deleted more than Long.MAX_VALUE large files, reset counter to 0");
         deletedLargeFiles.set(0L);
       }
       deletedLargeFiles.incrementAndGet();
     } else {
       if (deletedSmallFiles.get() == Long.MAX_VALUE) {
-        LOG.info("Deleted more than Long.MAX_VALUE small files, reset counter to 0");
+        LOG.debug("Deleted more than Long.MAX_VALUE small files, reset counter to 0");
         deletedSmallFiles.set(0L);
       }
       if (fromLargeQueue) {