Release LevelDB 1.16
- Make Log::Reader not report a corruption when the last record in a
log file is truncated.
- Fix issue 224: variable created but not utilized.
- Remove comment that referenced a removed feature.
diff --git a/Makefile b/Makefile
index 344ff29..a94f1a2 100644
--- a/Makefile
+++ b/Makefile
@@ -72,7 +72,7 @@
else
# Update db.h if you change these.
SHARED_MAJOR = 1
-SHARED_MINOR = 15
+SHARED_MINOR = 16
SHARED1 = libleveldb.$(PLATFORM_SHARED_EXT)
SHARED2 = $(SHARED1).$(SHARED_MAJOR)
SHARED3 = $(SHARED1).$(SHARED_MAJOR).$(SHARED_MINOR)
diff --git a/db/log_reader.cc b/db/log_reader.cc
index b35f115..4919216 100644
--- a/db/log_reader.cc
+++ b/db/log_reader.cc
@@ -133,7 +133,9 @@
case kEof:
if (in_fragmented_record) {
- ReportCorruption(scratch->size(), "partial record without end(3)");
+ // This can be caused by the writer dying immediately after
+ // writing a physical record but before completing the next; don't
+ // treat it as a corruption, just ignore the entire logical record.
scratch->clear();
}
return false;
@@ -193,13 +195,12 @@
eof_ = true;
}
continue;
- } else if (buffer_.size() == 0) {
- // End of file
- return kEof;
} else {
- size_t drop_size = buffer_.size();
+ // Note that if buffer_ is non-empty, we have a truncated header at the
+ // end of the file, which can be caused by the writer crashing in the
+ // middle of writing the header. Instead of considering this an error,
+ // just report EOF.
buffer_.clear();
- ReportCorruption(drop_size, "truncated record at end of file");
return kEof;
}
}
@@ -213,8 +214,14 @@
if (kHeaderSize + length > buffer_.size()) {
size_t drop_size = buffer_.size();
buffer_.clear();
- ReportCorruption(drop_size, "bad record length");
- return kBadRecord;
+ if (!eof_) {
+ ReportCorruption(drop_size, "bad record length");
+ return kBadRecord;
+ }
+ // If the end of the file has been reached without reading |length| bytes
+ // of payload, assume the writer died in the middle of writing the record.
+ // Don't report a corruption.
+ return kEof;
}
if (type == kZeroType && length == 0) {
diff --git a/db/log_test.cc b/db/log_test.cc
index 4c5cf87..91d3caa 100644
--- a/db/log_test.cc
+++ b/db/log_test.cc
@@ -351,20 +351,32 @@
ASSERT_EQ("OK", MatchError("unknown record type"));
}
-TEST(LogTest, TruncatedTrailingRecord) {
+TEST(LogTest, TruncatedTrailingRecordIsIgnored) {
Write("foo");
ShrinkSize(4); // Drop all payload as well as a header byte
ASSERT_EQ("EOF", Read());
- ASSERT_EQ(kHeaderSize - 1, DroppedBytes());
- ASSERT_EQ("OK", MatchError("truncated record at end of file"));
+ // Truncated last record is ignored, not treated as an error.
+ ASSERT_EQ(0, DroppedBytes());
+ ASSERT_EQ("", ReportMessage());
}
TEST(LogTest, BadLength) {
+ const int kPayloadSize = kBlockSize - kHeaderSize;
+ Write(BigString("bar", kPayloadSize));
+ Write("foo");
+ // Least significant size byte is stored in header[4].
+ IncrementByte(4, 1);
+ ASSERT_EQ("foo", Read());
+ ASSERT_EQ(kBlockSize, DroppedBytes());
+ ASSERT_EQ("OK", MatchError("bad record length"));
+}
+
+TEST(LogTest, BadLengthAtEndIsIgnored) {
Write("foo");
ShrinkSize(1);
ASSERT_EQ("EOF", Read());
- ASSERT_EQ(kHeaderSize + 2, DroppedBytes());
- ASSERT_EQ("OK", MatchError("bad record length"));
+ ASSERT_EQ(0, DroppedBytes());
+ ASSERT_EQ("", ReportMessage());
}
TEST(LogTest, ChecksumMismatch) {
@@ -415,6 +427,24 @@
ASSERT_EQ("OK", MatchError("partial record without end"));
}
+TEST(LogTest, MissingLastIsIgnored) {
+ Write(BigString("bar", kBlockSize));
+ // Remove the LAST block, including header.
+ ShrinkSize(14);
+ ASSERT_EQ("EOF", Read());
+ ASSERT_EQ("", ReportMessage());
+ ASSERT_EQ(0, DroppedBytes());
+}
+
+TEST(LogTest, PartialLastIsIgnored) {
+ Write(BigString("bar", kBlockSize));
+ // Cause a bad record length in the LAST block.
+ ShrinkSize(1);
+ ASSERT_EQ("EOF", Read());
+ ASSERT_EQ("", ReportMessage());
+ ASSERT_EQ(0, DroppedBytes());
+}
+
TEST(LogTest, ErrorJoinsRecords) {
// Consider two fragmented records:
// first(R1) last(R1) first(R2) last(R2)
diff --git a/db/repair.cc b/db/repair.cc
index 96c9b37..7727faf 100644
--- a/db/repair.cc
+++ b/db/repair.cc
@@ -242,7 +242,6 @@
}
void ExtractMetaData() {
- std::vector<TableInfo> kept;
for (size_t i = 0; i < table_numbers_.size(); i++) {
ScanTable(table_numbers_[i]);
}
diff --git a/include/leveldb/c.h b/include/leveldb/c.h
index 1fa5886..1048fe3 100644
--- a/include/leveldb/c.h
+++ b/include/leveldb/c.h
@@ -9,7 +9,6 @@
Does not support:
. getters for the option types
. custom comparators that implement key shortening
- . capturing post-write-snapshot
. custom iter, db, env, cache implementations using just the C bindings
Some conventions:
diff --git a/include/leveldb/db.h b/include/leveldb/db.h
index 5ffb29d..4f3a851 100644
--- a/include/leveldb/db.h
+++ b/include/leveldb/db.h
@@ -14,7 +14,7 @@
// Update Makefile if you change these
static const int kMajorVersion = 1;
-static const int kMinorVersion = 15;
+static const int kMinorVersion = 16;
struct Options;
struct ReadOptions;
