pool: Improve logging of common errors

Improve log levels and log messages of common errors found in
production log files.

Target: trunk
Require-book: no
Require-notes: yes
Ticket: http://rt.dcache.org/Ticket/Display.html?id=7685
Acked-by: Paul Millar <paul.millar@desy.de>
Acked-by: Dmitry Litvinsev <litvinse@fnal.gov>
Patch: http://rb.dcache.org/r/5255/
(cherry picked from commit 5302c40)

Author: gbehrmann

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

@@ -123,7 +123,7 @@ public void run()
                         mover.setTransferStatus(CacheException.UNEXPECTED_SYSTEM_EXCEPTION,
                                 "Transfer failed in post-processing: " + e.getMessage());
                     } catch (RuntimeException e) {
-                        LOGGER.error("Transfer failed in post-processing due to unexpected exception", e);
+                        LOGGER.error("Transfer failed in post-processing. Please report this bug to support@dcache.org.", e);
                         mover.setTransferStatus(CacheException.UNEXPECTED_SYSTEM_EXCEPTION,
                                 "Transfer failed due to unexpected exception: " + e.getMessage());
                     } catch (Throwable e) {

modules/dcache/src/main/java/org/dcache/pool/classic/PoolV4.java

@@ -1961,7 +1961,9 @@ private String mover_set_max_active(IoScheduler js, Args args)
         return sb.toString();
     }
 
-    public Object ac_mover_ls_$_0_1(Args args) throws NoSuchElementException {
+    public Object ac_mover_ls_$_0_1(Args args)
+            throws NoSuchElementException, NumberFormatException
+    {
         String queueName = args.getOpt("queue");
         boolean binary = args.hasOption("binary");
 
@@ -1994,6 +1996,7 @@ private String mover_set_max_active(IoScheduler js, Args args)
     }
 
     public Object ac_p2p_ls_$_0_1(Args args)
+            throws NoSuchElementException, NumberFormatException
     {
         IoScheduler p2pQueue = _ioQueue.getQueue(P2P_QUEUE_NAME);