diff --git a/src/java/org/apache/cassandra/io/compress/CompressionMetadata.java b/src/java/org/apache/cassandra/io/compress/CompressionMetadata.java
index f550de40e7..eef9d0c67b 100644
--- a/src/java/org/apache/cassandra/io/compress/CompressionMetadata.java
+++ b/src/java/org/apache/cassandra/io/compress/CompressionMetadata.java
@@ -38,7 +38,6 @@ import java.util.TreeSet;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.primitives.Longs;
 
-import org.apache.cassandra.cache.RefCountedMemory;
 import org.apache.cassandra.config.DatabaseDescriptor;
 import org.apache.cassandra.db.TypeSizes;
 import org.apache.cassandra.exceptions.ConfigurationException;
@@ -49,7 +48,6 @@ import org.apache.cassandra.io.sstable.Component;
 import org.apache.cassandra.io.sstable.CorruptSSTableException;
 import org.apache.cassandra.io.sstable.Descriptor;
 import org.apache.cassandra.io.sstable.format.Version;
-import org.apache.cassandra.io.sstable.format.SSTableWriter;
 import org.apache.cassandra.io.util.DataOutputPlus;
 import org.apache.cassandra.io.util.FileUtils;
 import org.apache.cassandra.io.util.Memory;
@@ -180,7 +178,7 @@ public class CompressionMetadata
             if (chunkCount <= 0)
                 throw new IOException("Compressed file with 0 chunks encountered: " + input);
 
-            Memory offsets = Memory.allocate(chunkCount * 8);
+            Memory offsets = Memory.allocate(chunkCount * 8L);
 
             for (int i = 0; i < chunkCount; i++)
             {
@@ -247,7 +245,7 @@ public class CompressionMetadata
             endIndex = section.right % parameters.chunkLength() == 0 ? endIndex - 1 : endIndex;
             for (int i = startIndex; i <= endIndex; i++)
             {
-                long offset = i * 8;
+                long offset = i * 8L;
                 long chunkOffset = chunkOffsets.getLong(offset);
                 long nextChunkOffset = offset + 8 == chunkOffsetsSize
                                      ? compressedFileLength
@@ -269,9 +267,8 @@ public class CompressionMetadata
         private final CompressionParameters parameters;
         private final String filePath;
         private int maxCount = 100;
-        private SafeMemory offsets = new SafeMemory(maxCount * 8);
+        private SafeMemory offsets = new SafeMemory(maxCount * 8L);
         private int count = 0;
-        private Version latestVersion =  DatabaseDescriptor.getSSTableFormat().info.getLatestVersion();
 
 
         private Writer(CompressionParameters parameters, String path)
@@ -289,11 +286,11 @@ public class CompressionMetadata
         {
             if (count == maxCount)
             {
-                SafeMemory newOffsets = offsets.copy((maxCount *= 2) * 8);
+                SafeMemory newOffsets = offsets.copy((maxCount *= 2L) * 8);
                 offsets.close();
                 offsets = newOffsets;
             }
-            offsets.setLong(8 * count++, offset);
+            offsets.setLong(8L * count++, offset);
         }
 
         private void writeHeader(DataOutput out, long dataLength, int chunks)
@@ -363,7 +360,7 @@ public class CompressionMetadata
                     count = (int) (dataLength / parameters.chunkLength());
                     // grab our actual compressed length from the next offset from our the position we're opened to
                     if (count < this.count)
-                        compressedLength = offsets.getLong(count * 8);
+                        compressedLength = offsets.getLong(count * 8L);
                     break;
 
                 default:
@@ -404,7 +401,7 @@ public class CompressionMetadata
 	            assert chunks == count;
 	            writeHeader(out, dataLength, chunks);
                 for (int i = 0 ; i < count ; i++)
-                    out.writeLong(offsets.getLong(i * 8));
+                    out.writeLong(offsets.getLong(i * 8L));
             }
             finally
             {
diff --git a/src/java/org/apache/cassandra/io/sstable/format/SSTableReader.java b/src/java/org/apache/cassandra/io/sstable/format/SSTableReader.java
index 0b55794583..4468d5763f 100644
--- a/src/java/org/apache/cassandra/io/sstable/format/SSTableReader.java
+++ b/src/java/org/apache/cassandra/io/sstable/format/SSTableReader.java
@@ -1117,7 +1117,7 @@ public abstract class SSTableReader extends SSTable implements RefCounted<SSTabl
             sampleKeyCount += (sampleIndexRange.right - sampleIndexRange.left + 1);
 
         // adjust for the current sampling level: (BSL / SL) * index_interval_at_full_sampling
-        long estimatedKeys = sampleKeyCount * (Downsampling.BASE_SAMPLING_LEVEL * indexSummary.getMinIndexInterval()) / indexSummary.getSamplingLevel();
+        long estimatedKeys = sampleKeyCount * ((long) Downsampling.BASE_SAMPLING_LEVEL * indexSummary.getMinIndexInterval()) / indexSummary.getSamplingLevel();
         return Math.max(1, estimatedKeys);
     }
 
diff --git a/src/java/org/apache/cassandra/streaming/StreamReceiveTask.java b/src/java/org/apache/cassandra/streaming/StreamReceiveTask.java
index 3186291537..1049d4397b 100644
--- a/src/java/org/apache/cassandra/streaming/StreamReceiveTask.java
+++ b/src/java/org/apache/cassandra/streaming/StreamReceiveTask.java
@@ -115,7 +115,7 @@ public class StreamReceiveTask extends StreamTask
             }
             ColumnFamilyStore cfs = Keyspace.open(kscf.left).getColumnFamilyStore(kscf.right);
 
-            File lockfiledir = cfs.directories.getWriteableLocationAsFile(task.sstables.size() * 256);
+            File lockfiledir = cfs.directories.getWriteableLocationAsFile(task.sstables.size() * 256L);
             if (lockfiledir == null)
                 throw new IOError(new IOException("All disks full"));
             StreamLockfile lockfile = new StreamLockfile(lockfiledir, UUID.randomUUID());
diff --git a/tools/stress/src/org/apache/cassandra/stress/settings/SettingsSchema.java b/tools/stress/src/org/apache/cassandra/stress/settings/SettingsSchema.java
index 93a9bd7619..54f27bc2ea 100644
--- a/tools/stress/src/org/apache/cassandra/stress/settings/SettingsSchema.java
+++ b/tools/stress/src/org/apache/cassandra/stress/settings/SettingsSchema.java
@@ -125,7 +125,7 @@ public class SettingsSchema implements Serializable
             /* end */
 
             System.out.println(String.format("Created keyspaces. Sleeping %ss for propagation.", settings.node.nodes.size()));
-            Thread.sleep(settings.node.nodes.size() * 1000); // seconds
+            Thread.sleep(settings.node.nodes.size() * 1000L); // seconds
         }
         catch (InvalidRequestException e)
         {