Remove unused logger warnings

src/main/java/org/torproject/metrics/collector/relaydescs/RelayDescriptorDownloader.java

@@ -347,7 +347,7 @@ public class RelayDescriptorDownloader {
         "stats/missing-relay-descriptors");
     if (this.missingDescriptorsFile.exists()) {
       try {
-        logger.warn("Reading file {}...",
+        logger.debug("Reading file {}...",
             this.missingDescriptorsFile.getAbsolutePath());
         BufferedReader br = new BufferedReader(new FileReader(
             this.missingDescriptorsFile));
@@ -395,12 +395,12 @@ public class RelayDescriptorDownloader {
               }
             }
           } else {
-            logger.warn("Invalid line '{}' in {}. Ignoring.", line,
+            logger.debug("Invalid line '{}' in {}. Ignoring.", line,
                 this.missingDescriptorsFile.getAbsolutePath());
           }
         }
         br.close();
-        logger.warn("Finished reading file {}.",
+        logger.debug("Finished reading file {}.",
             this.missingDescriptorsFile.getAbsolutePath());
       } catch (IOException e) {
         logger.warn("Failed to read file {}! This means that we might forget "
@@ -416,14 +416,14 @@ public class RelayDescriptorDownloader {
         "stats/last-downloaded-all-descriptors");
     if (this.lastDownloadedAllDescriptorsFile.exists()) {
       try {
-        logger.warn("Reading file {}...",
+        logger.debug("Reading file {}...",
             this.lastDownloadedAllDescriptorsFile.getAbsolutePath());
         BufferedReader br = new BufferedReader(new FileReader(
             this.lastDownloadedAllDescriptorsFile));
         String line;
         while ((line = br.readLine()) != null) {
           if (line.split(",").length != 2) {
-            logger.warn("Invalid line '{}' in {}. Ignoring.", line,
+            logger.debug("Invalid line '{}' in {}. Ignoring.", line,
                 this.lastDownloadedAllDescriptorsFile.getAbsolutePath());
           } else {
             String[] parts = line.split(",");
@@ -434,7 +434,7 @@ public class RelayDescriptorDownloader {
           }
         }
         br.close();
-        logger.warn("Finished reading file {}.",
+        logger.debug("Finished reading file {}.",
             this.lastDownloadedAllDescriptorsFile.getAbsolutePath());
       } catch (IOException e) {
         logger.warn("Failed to read file {}! This means that we might "
@@ -444,7 +444,7 @@ public class RelayDescriptorDownloader {
       }
     }
 
-    /* Make a list of at most four directory authorities that we want to
+    /* Make a list of all directory authorities that we want to
      * download all server and extra-info descriptors from. */
     this.downloadAllDescriptorsFromAuthorities = new HashSet<>();
     for (String authority : this.authorities) {
@@ -896,7 +896,7 @@ public class RelayDescriptorDownloader {
     URL url = new URL(fullUrl);
     allData = Downloader.downloadFromHttpServer(url, isCompressed);
     int receivedDescriptors = 0;
-    logger.warn("Downloaded {} -> ({} bytes)", fullUrl,
+    logger.debug("Downloaded {} -> ({} bytes)", fullUrl,
         allData == null ? 0 : allData.length);
     /* TODO This should be refactored to take into account that the download
      * is tried a defined number of times. */
@@ -909,7 +909,7 @@ public class RelayDescriptorDownloader {
             + "will wait 45 SECONDS to avoid DOS protections.", authority);
         TimeUnit.SECONDS.sleep(45);
         allData = Downloader.downloadFromHttpServer(url, isCompressed);
-        logger.warn("Downloaded {} -> ({} bytes)", fullUrl,
+        logger.debug("Downloaded {} -> ({} bytes)", fullUrl,
             allData == null ? 0 : allData.length);
         if (null != allData) {
           receivedDescriptors = processDownloadResponse(resource, allData,
@@ -1028,7 +1028,7 @@ public class RelayDescriptorDownloader {
     int missingServerDescriptors = 0;
     int missingExtraInfoDescriptors = 0;
     try {
-      logger.warn("Writing file {}...",
+      logger.debug("Writing file {}...",
           this.missingDescriptorsFile.getAbsolutePath());
       this.missingDescriptorsFile.getParentFile().mkdirs();
       BufferedWriter bw = new BufferedWriter(new FileWriter(
@@ -1055,7 +1055,7 @@ public class RelayDescriptorDownloader {
         bw.write(key + "," + value + "\n");
       }
       bw.close();
-      logger.warn("Finished writing file {}.",
+      logger.debug("Finished writing file {}.",
           this.missingDescriptorsFile.getAbsolutePath());
     } catch (IOException e) {
       logger.warn("Failed writing {}!",