nilmdb/fsck/fsck.py

@@ -52,7 +52,7 @@ def err(format, *args):
 
 
 # Decorator that retries a function if it returns a specific value
-def retry_if_raised(exc, message=None, max_retries=1000):
+def retry_if_raised(exc, message=None, max_retries=100):
     def f1(func):
         def f2(*args, **kwargs):
             for n in range(max_retries):
@@ -60,7 +60,7 @@ def retry_if_raised(exc, message=None, max_retries=1000):
                     return func(*args, **kwargs)
                 except exc:
                     if message:
-                        log(f"{message} ({n+1})\n\n")
+                        log("%s\n\n", message)
             raise Exception("Max number of retries (%d) exceeded; giving up" %
                             max_retries)
         return f2
@@ -238,7 +238,9 @@ class Fsck(object):
                         try:
                             posiset += new
                         except IntervalError:
-                            self.fix_row_overlap(sid, path, posiset, new)
+                            raise FsckError("%s: overlap in file offsets:\n"
+                                            "set: %s\nnew: %s",
+                                            path, str(posiset), str(new))
 
                 try:
                     # Check bulkdata
@@ -266,48 +268,6 @@ class Fsck(object):
                                     path, str(e))
                 tab.close()
 
-
-    def fix_row_overlap(self, sid, path, existing, new):
-        # If the file rows (spos, epos) overlap in the interval table,
-        # and the overlapping ranges look like this:
-        #    A --------- C
-        #           B -------- D
-        # Then we can try changing the first interval to go from
-        # A to B instead.
-        msg = (f"{path}: overlap in file offsets:\n"
-               f"existing ranges: {existing}\n"
-               f"overlapping interval: {new}")
-        if not self.fix:
-            raise FixableFsckError(msg)
-        err(f"\n{msg}\nSeeing if we can truncate one of them...\n")
-
-        # See if there'e exactly one interval that overlaps the
-        # conflicting one in the right way
-        match = None
-        for intv in self.stream_interval[sid]:
-            (stime, etime, spos, epos) = intv
-            if spos < new.start and epos > new.start:
-                if match:
-                    err(f"no, more than one interval matched:\n"
-                        f"{intv}\n{match}\n")
-                    raise FsckError(f"{path}: unfixable overlap")
-                match = intv
-        if match is None:
-            err(f"no intervals overlapped in the right way\n")
-            raise FsckError(f"{path}: unfixable overlap")
-
-        # Truncate the file position
-        err(f"truncating {match}\n")
-        with self.sql:
-            cur = self.sql.cursor()
-            cur.execute("UPDATE ranges SET end_pos=? "
-                        "WHERE stream_id=? AND start_time=? AND "
-                        "end_time=? AND start_pos=? AND end_pos=?",
-                        (new.start, sid, *match))
-            if cur.rowcount != 1:  # pragma: no cover (shouldn't fail)
-                raise FsckError("failed to fix SQL database")
-        raise RetryFsck
-
     ### Check that bulkdata is good enough to be opened
 
     @retry_if_raised(RetryFsck)
@@ -478,8 +438,8 @@ class Fsck(object):
 
         # Otherwise, the only hope is to delete the interval entirely.
         err("*** Deleting the entire interval from SQL.\n")
-        err("This may leave stale data on disk.  To fix that, copy all "
-            "data from this stream to a new stream using nilm-copy, then\n")
+        err("This may leave stale data on disk.  To fix that, copy all\n")
+        err("data from this stream to a new stream using nilm-copy, then\n")
         err("remove all data from and destroy %s.\n", path)
         with self.sql:
             cur = self.sql.cursor()
@@ -552,32 +512,18 @@ class Fsck(object):
                 match = (ts < stime) | (ts >= etime)
                 if match.any():
                     row = numpy.argmax(match)
-                    if ts[row] != 0:
-                        raise FsckError("%s: data timestamp %d at row %d "
-                                        "outside interval range [%d,%d)",
-                                        path, ts[row], row + start,
-                                        stime, etime)
-
-                    # Timestamp is zero and out of the expected range;
-                    # assume file ends with zeroed data and just truncate it.
-                    self.fix_table_by_truncating(
-                        path, tab, row + start,
-                        "data timestamp is out of range, and zero")
+                    raise FsckError("%s: data timestamp %d at row %d "
+                                    "outside interval range [%d,%d)",
+                                    path, ts[row], row + start,
+                                    stime, etime)
 
                 # Verify that timestamps are monotonic
                 match = numpy.diff(ts) <= 0
                 if match.any():
                     row = numpy.argmax(match)
-                    if ts[row+1] != 0:
-                        raise FsckError("%s: non-monotonic timestamp (%d -> %d)"
-                                        " at row %d", path, ts[row], ts[row+1],
-                                        row + start)
-
-                    # Timestamp is zero and non-monotonic;
-                    # assume file ends with zeroed data and just truncate it.
-                    self.fix_table_by_truncating(
-                        path, tab, row + start + 1,
-                        "data timestamp is non-monotonic, and zero")
+                    raise FsckError("%s: non-monotonic timestamp (%d -> %d)"
+                                    " at row %d", path, ts[row], ts[row+1],
+                                    row + start)
 
                 first_ts = ts[0]
                 if last_ts is not None and first_ts <= last_ts:
@@ -596,15 +542,3 @@ class Fsck(object):
                 done += count
                 update(done)
         return done
-
-    def fix_table_by_truncating(self, path, tab, row, reason):
-        # Simple fix for bad data: truncate the table at the given row.
-        # On retry, fix_bad_interval will correct the database and timestamps
-        # to account for this truncation.
-        msg = f"{path}: bad data in table, starting at row {row}: {reason}"
-        if not self.fix:
-            raise FixableFsckError(msg)
-        err(f"\n{msg}\nWill try truncating table\n")
-        (subdir, fname, offs, count) = tab._offset_from_row(row)
-        tab._remove_or_truncate_file(subdir, fname, offs)
-        raise RetryFsck

tests/test_fsck.py

@@ -123,7 +123,7 @@ class TestFsck(object):
         self.failmsg("test2h", "missing bulkdata dir")
         self.failmsg("test2i", "bad bulkdata table")
         self.failmsg("test2j", "overlap in intervals")
-        self.failmsg("test2k", "overlap in file offsets", fix=False)
+        self.failmsg("test2k", "overlap in file offsets")
         self.ok("test2k1")
         self.failmsg("test2l", "unsupported bulkdata version")
         self.failmsg("test2m", "bad rows_per_file")
@@ -168,17 +168,3 @@ class TestFsck(object):
         self.failmsg("test2v1", "bad bulkdata table")
         self.failmsg("test2v2", "empty, with corrupted format file", fix=False)
         self.okmsg("test2v2", "empty, with corrupted format file")
-
-        self.failmsg("test2w1", "out of range, and zero", fix=False)
-        self.okmsg("test2w1", "Will try truncating table")
-        self.contain("Deleting the entire interval")
-
-        self.failmsg("test2w2", "non-monotonic, and zero", fix=False)
-        self.okmsg("test2w2", "Will try truncating table")
-        self.contain("new end: time 237000001, pos 238")
-
-        self.failmsg("test2x1", "overlap in file offsets", fix=False)
-        self.okmsg("test2x1", "truncating")
-
-        self.failmsg("test2x2", "unfixable overlap")
-        self.failmsg("test2x3", "unfixable overlap")