Adding filechannel name to the exception (#3064)

Signed-off-by: Jiri Peinlich <jiri.peinlich@gmail.com>

Co-authored-by: Sally MacFarlane <sally.macfarlane@consensys.net>

services/tasks/src/main/java/org/hyperledger/besu/services/tasks/FlatFileTaskCollection.java

@@ -89,7 +89,8 @@ public class FlatFileTaskCollection<T> implements TaskCollection<T> {
           StandardOpenOption.WRITE,
           StandardOpenOption.CREATE);
     } catch (final IOException e) {
-      throw new StorageException(e);
+      throw new StorageException(
+          "There was a problem opening FileChannel " + pathForFileNumber(fileNumber), e);
     }
   }
 
@@ -106,7 +107,8 @@ public class FlatFileTaskCollection<T> implements TaskCollection<T> {
         writeFileChannel = openWriteFileChannel(writeFileNumber);
       }
     } catch (final IOException e) {
-      throw new StorageException(e);
+      throw new StorageException(
+          "There was a problem adding to FileChannel " + pathForFileNumber(writeFileNumber), e);
     }
   }
 
@@ -123,7 +125,8 @@ public class FlatFileTaskCollection<T> implements TaskCollection<T> {
       size--;
       return task;
     } catch (final IOException e) {
-      throw new StorageException(e);
+      throw new StorageException(
+          "There was a problem removing from FileChannel " + pathForFileNumber(readFileNumber), e);
     }
   }
 
@@ -249,6 +252,10 @@ public class FlatFileTaskCollection<T> implements TaskCollection<T> {
     StorageException(final Throwable t) {
       super(t);
     }
+
+    StorageException(final String m, final Throwable t) {
+      super(m, t);
+    }
   }
 
   private static class FlatFileTask<T> implements Task<T> {