fix deleting bucket

other/java/s3copy/copier/src/main/java/com/seaweedfs/s3/PutObject.java

@@ -79,6 +79,13 @@ public class PutObject {
             // test deletes
             s3Client.deleteObject(bucketName, stringObjKeyName);
 
+
+            // delete bucket
+            String tmpBucket = "tmpbucket";
+            s3Client.createBucket(tmpBucket);
+            s3Client.putObject(tmpBucket, stringObjKeyName, stringContent);
+            s3Client.deleteBucket(tmpBucket);
+
         } catch (AmazonServiceException e) {
             // The call was transmitted successfully, but Amazon S3 couldn't process
             // it, so it returned an error response.

weed/storage/volume_read_write.go

@@ -42,7 +42,9 @@ func (v *Volume) Destroy() (err error) {
 	}
 	v.Close()
 	os.Remove(v.FileName() + ".dat")
-	err = v.nm.Destroy()
+	if v.nm!=nil{
+		err = v.nm.Destroy()
+	}
 	os.Remove(v.FileName() + ".cpd")
 	os.Remove(v.FileName() + ".cpx")
 	os.Remove(v.FileName() + ".ldb")