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fix: update info of WAL entry found within loop in walScanLogGetLastVer

This commit is contained in:
benguang.zhao 2022-11-01 17:56:24 +08:00
parent 3c1c95c5e6
commit 4e46b78aa0
1 changed files with 15 additions and 16 deletions
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31
source/libs/wal/src/walMeta.c
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@ -73,14 +73,16 @@ static FORCE_INLINE int64_t walScanLogGetLastVer(SWal* pWal, int32_t fileIdx) {
int64_t capacity = 0;
int64_t readSize = 0;
char* buf = NULL;
int64_t found = -1;
bool firstTrial = pFileInfo->fileSize < fileSize;
int64_t offset = TMIN(pFileInfo->fileSize, fileSize);
int64_t offsetForward = offset - stepSize + walCkHeadSz - 1;
int64_t offsetBackward = offset;
int64_t recoverSize = end - offset;
int64_t retVer = -1;
int64_t lastEntryBeginOffset = 0;
int64_t lastEntryEndOffset = 0;
if (2 * tsWalFsyncDataSizeLimit < recoverSize) {
// check recover size
if (2 * tsWalFsyncDataSizeLimit + offset < end) {
wWarn("vgId:%d, possibly corrupted WAL range exceeds size limit (i.e. %" PRId64 " bytes). offset:%" PRId64
", end:%" PRId64 ", file:%s",
pWal->cfg.vgId, 2 * tsWalFsyncDataSizeLimit, offset, end, fnameStr);
@ -190,44 +192,41 @@ static FORCE_INLINE int64_t walScanLogGetLastVer(SWal* pWal, int32_t fileIdx) {
}
// found one
found = pos;
retVer = logContent->head.version;
lastEntryBeginOffset = offset + pos;
lastEntryEndOffset = offset + pos + sizeof(SWalCkHead) + logContent->head.bodyLen;
// try next
haystack = buf + pos + 1;
}
if (end == fileSize) firstTrial = false;
if (firstTrial && terrno == TSDB_CODE_SUCCESS) continue;
if (found >= 0 || offset == 0) break;
if (retVer >= 0 || offset == 0) break;
}
// determine end of last entry
SWalCkHead* lastEntry = (found >= 0) ? (SWalCkHead*)(buf + found) : NULL;
int64_t retVer = -1;
int64_t lastEntryBeginOffset = 0;
int64_t lastEntryEndOffset = 0;
if (lastEntry == NULL) {
if (retVer < 0) {
terrno = TSDB_CODE_WAL_LOG_NOT_EXIST;
} else {
retVer = lastEntry->head.version;
lastEntryBeginOffset = offset + (int64_t)((char*)lastEntry - (char*)buf);
lastEntryEndOffset = lastEntryBeginOffset + sizeof(SWalCkHead) + lastEntry->head.bodyLen;
}
// truncate file
if (lastEntryEndOffset != fileSize) {
wWarn("vgId:%d, repair meta truncate file %s to %" PRId64 ", orig size %" PRId64, pWal->cfg.vgId, fnameStr,
lastEntryEndOffset, fileSize);
if (taosFtruncateFile(pFile, lastEntryEndOffset) < 0) {
wError("failed to truncate file due to %s. file:%s", strerror(errno), fnameStr);
terrno = TAOS_SYSTEM_ERROR(errno);
goto _err;
}
if (taosFsyncFile(pFile) < 0) {
wError("failed to fsync file due to %s. file:%s", strerror(errno), fnameStr);
terrno = TAOS_SYSTEM_ERROR(errno);
goto _err;
}
}
pFileInfo->fileSize = lastEntryEndOffset;
taosCloseFile(&pFile);