kr11 commented on a change in pull request #34: fix sonar 
URL: https://github.com/apache/incubator-iotdb/pull/34#discussion_r251230154
 
 

 ##########
 File path: 
tsfile/src/main/java/org/apache/iotdb/tsfile/common/conf/TSFileDescriptor.java
 ##########
 @@ -105,39 +101,48 @@ private void loadProps() {
     Properties properties = new Properties();
     try {
       properties.load(inputStream);
-      conf.groupSizeInByte = Integer
-          .parseInt(properties.getProperty("group_size_in_byte", 
conf.groupSizeInByte + ""));
-      conf.pageSizeInByte = Integer
-          .parseInt(properties.getProperty("page_size_in_byte", 
conf.pageSizeInByte + ""));
-      conf.maxNumberOfPointsInPage = Integer.parseInt(
+      TSFileConfig.groupSizeInByte = Integer
+          .parseInt(
+              properties.getProperty("group_size_in_byte", 
TSFileConfig.groupSizeInByte + ""));
+      TSFileConfig.pageSizeInByte = Integer
+          .parseInt(properties.getProperty("page_size_in_byte", 
TSFileConfig.pageSizeInByte + ""));
+      TSFileConfig.maxNumberOfPointsInPage = Integer.parseInt(
           properties
-              .getProperty("max_number_of_points_in_page", 
conf.maxNumberOfPointsInPage + ""));
-      conf.timeSeriesDataType = properties
-          .getProperty("time_series_data_type", conf.timeSeriesDataType);
-      conf.maxStringLength = Integer
-          .parseInt(properties.getProperty("max_string_length", 
conf.maxStringLength + ""));
-      conf.floatPrecision = Integer
-          .parseInt(properties.getProperty("float_precision", 
conf.floatPrecision + ""));
-      conf.timeSeriesEncoder = properties
-          .getProperty("time_series_encoder", conf.timeSeriesEncoder);
-      conf.valueEncoder = properties.getProperty("value_encoder", 
conf.valueEncoder);
-      conf.compressor = properties.getProperty("compressor", conf.compressor);
+              .getProperty("max_number_of_points_in_page",
+                  TSFileConfig.maxNumberOfPointsInPage + ""));
+      TSFileConfig.timeSeriesDataType = properties
+          .getProperty("time_series_data_type", 
TSFileConfig.timeSeriesDataType);
+      TSFileConfig.maxStringLength = Integer
+          .parseInt(properties
+              .getProperty("max_string_length", 
Integer.toString(TSFileConfig.maxStringLength)));
+      TSFileConfig.floatPrecision = Integer
+          .parseInt(properties
+              .getProperty("float_precision", 
Integer.toString(TSFileConfig.floatPrecision)));
+      TSFileConfig.timeSeriesEncoder = properties
+          .getProperty("time_series_encoder", TSFileConfig.timeSeriesEncoder);
+      TSFileConfig.valueEncoder = properties
+          .getProperty("value_encoder", TSFileConfig.valueEncoder);
+      TSFileConfig.compressor = properties.getProperty("compressor", 
TSFileConfig.compressor);
     } catch (IOException e) {
       LOGGER.warn("Cannot load config file because {}, use default 
configuration", e.getMessage());
     } catch (Exception e) {
-      LOGGER.error("Loading settings {} failed because {}", url, 
e.getMessage());
+      LOGGER.error("Loading settings {} failed because {}", url, e);
 
 Review comment:
   Pass the exception `e` as the parameter of `error()`, but not the String, to 
obtain more  error information:
   `LOGGER.error("Loading settings {} failed because {}", url, e);`-->
   `LOGGER.error("Loading settings {} failed", url, e);`
   Same as below.

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