HDFS-13435. RBF: Improve the error loggings for printing the stack trace.

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/metrics/FederationMetrics.java

@@ -456,7 +456,7 @@ public class FederationMetrics implements FederationMBean {
         dev = (float) Math.sqrt(dev / usages.length);
       }
     } catch (IOException e) {
-      LOG.info("Cannot get the live nodes: {}", e.getMessage());
+      LOG.error("Cannot get the live nodes: {}", e.getMessage());
     }
 
     final Map<String, Object> innerInfo = new HashMap<>();

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/resolver/order/LocalResolver.java

@@ -210,8 +210,7 @@ public class LocalResolver extends RouterResolver<String, String> {
         }
       }
     } catch (IOException ioe) {
-      LOG.error("Cannot get Namenodes from the State Store: {}",
-          ioe.getMessage());
+      LOG.error("Cannot get Namenodes from the State Store", ioe);
     }
     return ret;
   }

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterHeartbeatService.java

@@ -100,7 +100,7 @@ public class RouterHeartbeatService extends PeriodicService {
           LOG.debug("Router heartbeat for router {}", routerId);
         }
       } catch (IOException e) {
-        LOG.error("Cannot heartbeat router {}: {}", routerId, e.getMessage());
+        LOG.error("Cannot heartbeat router {}", routerId, e);
       }
     } else {
       LOG.warn("Cannot heartbeat router {}: State Store unavailable", routerId);
@@ -132,7 +132,7 @@ public class RouterHeartbeatService extends PeriodicService {
         }
       }
     } catch (Exception e) {
-      LOG.error("Cannot get version for {}: {}", clazz, e.getMessage());
+      LOG.error("Cannot get version for {}", clazz, e);
     }
     return version;
   }

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcClient.java

@@ -1067,8 +1067,8 @@ public class RouterRpcClient {
           results.put(location, clazz.cast(result));
         } catch (CancellationException ce) {
           T loc = orderedLocations.get(i);
-          String msg =
-              "Invocation to \"" + loc + "\" for \"" + method + "\" timed out";
+          String msg = "Invocation to \"" + loc + "\" for \""
+              + method.getMethodName() + "\" timed out";
           LOG.error(msg);
           IOException ioe = new SubClusterTimeoutException(msg);
           exceptions.put(location, ioe);

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java

@@ -2293,7 +2293,7 @@ public class RouterRpcServer extends AbstractService
           return entry.isAll();
         }
       } catch (IOException e) {
-        LOG.error("Cannot get mount point: {}", e.getMessage());
+        LOG.error("Cannot get mount point", e);
       }
     }
     return false;
@@ -2314,7 +2314,7 @@ public class RouterRpcServer extends AbstractService
           return true;
         }
       } catch (IOException e) {
-        LOG.error("Cannot get mount point: {}", e.getMessage());
+        LOG.error("Cannot get mount point", e);
       }
     }
     return false;
@@ -2343,7 +2343,7 @@ public class RouterRpcServer extends AbstractService
           ret.put(child, entry.getDateModified());
         }
       } catch (IOException e) {
-        LOG.error("Cannot get mount point: {}", e.getMessage());
+        LOG.error("Cannot get mount point", e);
       }
     }
     return ret;

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/StateStoreService.java

@@ -183,7 +183,7 @@ public class StateStoreService extends CompositeService {
     } catch (NotCompliantMBeanException e) {
       throw new RuntimeException("Bad StateStoreMBean setup", e);
     } catch (MetricsException e) {
-      LOG.info("Failed to register State Store bean {}", e.getMessage());
+      LOG.error("Failed to register State Store bean {}", e.getMessage());
     }
 
     super.serviceInit(this.conf);

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/driver/impl/StateStoreFileBaseImpl.java

@@ -361,7 +361,7 @@ public abstract class StateStoreFileBaseImpl
           try {
             writer.close();
           } catch (IOException e) {
-            LOG.error("Cannot close the writer for {}", recordPathTemp);
+            LOG.error("Cannot close the writer for {}", recordPathTemp, e);
           }
         }
       }