Commit graph

15 commits

Author SHA1 Message Date
Krasi Georgiev c3ffdf1a99
Test createBlock and check all os.RemoveAll in the tests for errors. (#549)
Testing that createBlock creates blocks that can be opened.

and checking the os.RemoveAll for errors will catch errors for un-closed files under windows.

Many missing .Close() calls were added for fixing failing os.RemoveAll

Signed-off-by: Krasi Georgiev <kgeorgie@redhat.com>
2019-03-19 15:31:57 +02:00
Goutham Veeramachaneni 10d395259b Avoid creation of 0 sized segments. (#527)
If the corrupt segment is full, then we set donePages on open,
c59ed492b2/wal/wal.go (L235-L243)

Then when we try to repair, we set the segment to be a new segment but
we don't update the donePages: c59ed492b2/wal/wal.go (L334)

We we try to log to this, because donePages is full, we will never log
anything to this segment and create a new one: c59ed492b2/wal/wal.go (L486)

This does not cause issues because we simply concatenate the segments on
read, there by transparently skipping this `0b` segment.
2019-02-25 12:10:27 +02:00
Tom Wilkie 77d5a7d47a
LiveReader can get into an infinite loop on corrupt WALs. (#524)
Make WAL live tailer return EOF when the there is a half-written record at the end of the file.

Previously, this would cause an infinite loop as we ignored EOFs when filling the buffer.  We now differentiate between EOFs that read >0 bytes, and EOFs that didn't.

Add some more unit tests for tailing a corrupt WAL, and unify interfaces Reader and LiveReader for the purposes of testing.

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-02-19 14:33:57 +00:00
Tom Wilkie bc3b0bd429
Test to corrupt segments mid-WAL, repair and check we can read the correct number of records. (#528)
Test to corrupt segments mid-WAL, repair and check we can read the correct number of records.

Make segmentBufReader pad short segments with zeros, and only advance curr segment index after fully reading segment.
2019-02-18 19:05:07 +00:00
Simon Pasquier 2e69508536 Merge branch 'master' into update-makefile-common
Signed-off-by: Simon Pasquier <spasquie@redhat.com>
2019-01-22 10:47:31 +01:00
Callum Styan 3929359302
add live reader for WAL (#481)
* add live reader for WAL

Signed-off-by: Callum Styan <callumstyan@gmail.com>
2019-01-16 10:09:08 -08:00
Krasi Georgiev 2962202ed3
fix windows tests (#469)
Signed-off-by: Krasi Georgiev <kgeorgie@redhat.com>
2018-12-13 16:29:29 +03:00
Krasi Georgiev 48efdf8b81
refactor NewSegmentsRangeReader to take multi WAL ranges (#449)
* refactor NewSegmentsRangeReader to take multi WAL ranges

In case of an error when checkpointing the WAL the error doesn't show
the exact WAL index that is corrupter. this is because it uses
MultiReader to read multiply WAL files.
This refactoring allows the NewSegmentsRangeReader to take more than a
single WAL range and it reads all of the ranges by iterating each one.

this changes the logs from
create checkpoint: read segments: corruption after 4841144384 bytes:...
to
create checkpoint: read segments: corruption in segment
data/wal/00017351 at 123142208: ...

Signed-off-by: Krasi Georgiev <kgeorgie@redhat.com>
2018-11-30 16:46:16 +02:00
Krasi Georgiev 24520727a4
return an error when the last wal segment record is torn. (#451)
* return an error when the  last wal segment record is torn.

this ensures that a repair will be run when the last record in a segment
is torn.

Signed-off-by: Krasi Georgiev <kgeorgie@redhat.com>
2018-11-28 15:15:11 +02:00
Krasi Georgiev 3385571ddf
buffer-panic when reading a record after recPageTerm (#429)
Signed-off-by: Krasi Georgiev <kgeorgie@redhat.com>
2018-11-14 18:43:33 +02:00
Camille Janicki 0ce41118ed Add msg parameter to Equals function in testutil (#398)
* Add msg parameter to Equals function in testutil

Co-authored-by: Chris Marchbanks <csmarchbanks@gmail.com>
Signed-off-by: Camille Janicki <camille.janicki@gmail.com>
2018-10-03 11:08:31 +03:00
Goutham Veeramachaneni 9c8ca47399
Fix filehandling for windows (#392)
* Fix filehandling for windows

Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>

* Fix more windows filehandling issues

Windows: Close files before deleting Checkpoints.

Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>

Windows: Close writers in case of errors so they can be deleted

Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>

Windows: Close block so that it can be deleted.

Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>

Windows: Close file to delete it

Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>

Windows: Close dir so that it can be deleted.

Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>

Windows: close files so that they can be deleted.

Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>

* Review feedback

Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>
2018-09-21 11:01:22 +05:30
Goutham Veeramachaneni c7d0d10da4
Make sure WAL Repair can handle wrapped errors
Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>
2018-09-19 12:12:25 +05:30
Fabian Reinartz 449a2d0db7 wal: add segment type and repair procedure
Allow to repair the WAL based on the error returned by a reader
during a full scan over all records.

Signed-off-by: Fabian Reinartz <freinartz@google.com>
2018-07-19 07:24:40 -04:00
Fabian Reinartz 8e1f97fad4 wal: add write ahead log package
This adds a new WAL that's agnostic to the actual record contents.
It's much simpler and should be more resilient than the existing one.

Signed-off-by: Fabian Reinartz <freinartz@google.com>
2018-07-19 07:24:40 -04:00