pool: log with error if checksum scanner gets an IO error

Ticket: #8181
Acked-by: Karsten Schwank
Target: master, 2.9, 2.8, 2.7, 2.6
Require-book: no
Require-notes: no
(cherry picked from commit 5026cf9)
Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>

Author: kofemann

modules/dcache/src/main/java/org/dcache/pool/classic/ChecksumScanner.java

@@ -124,6 +124,9 @@ public void runIt() throws Exception
                     } catch (CacheException e) {
                         _log.warn("Checksum scanner failed for {}: {}", id, e.getMessage());
                         _badCount++;
+                    } catch (IOException e) {
+                        _log.error("Checksum scanner failed with IO error for {}: {}", id, e.getMessage());
+                        _badCount++;
                     }
                     _totalCount++;
                 }
@@ -437,6 +440,7 @@ private void scanFiles(PnfsId[] repository)
                 } catch (IOException e) {
                     _log.error("Failed to verify the checksum of {} (skipping): {}",
                             id, e.getMessage());
+                    _badCount++;
                 }
                 _lastFileChecked = id;
                 _totalCount++;