fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
344 lines
13 KiB
344 lines
13 KiB
// Copyright (c) 2018-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under both the GPLv2 (found in the
|
|
// COPYING file in the root directory) and Apache 2.0 License
|
|
// (found in the LICENSE.Apache file in the root directory).
|
|
//
|
|
#include "db/error_handler.h"
|
|
#include "db/db_impl/db_impl.h"
|
|
#include "db/event_helpers.h"
|
|
#include "file/sst_file_manager_impl.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
// Maps to help decide the severity of an error based on the
|
|
// BackgroundErrorReason, Code, SubCode and whether db_options.paranoid_checks
|
|
// is set or not. There are 3 maps, going from most specific to least specific
|
|
// (i.e from all 4 fields in a tuple to only the BackgroundErrorReason and
|
|
// paranoid_checks). The less specific map serves as a catch all in case we miss
|
|
// a specific error code or subcode.
|
|
std::map<std::tuple<BackgroundErrorReason, Status::Code, Status::SubCode, bool>,
|
|
Status::Severity>
|
|
ErrorSeverityMap = {
|
|
// Errors during BG compaction
|
|
{std::make_tuple(BackgroundErrorReason::kCompaction,
|
|
Status::Code::kIOError, Status::SubCode::kNoSpace,
|
|
true),
|
|
Status::Severity::kSoftError},
|
|
{std::make_tuple(BackgroundErrorReason::kCompaction,
|
|
Status::Code::kIOError, Status::SubCode::kNoSpace,
|
|
false),
|
|
Status::Severity::kNoError},
|
|
{std::make_tuple(BackgroundErrorReason::kCompaction,
|
|
Status::Code::kIOError, Status::SubCode::kSpaceLimit,
|
|
true),
|
|
Status::Severity::kHardError},
|
|
// Errors during BG flush
|
|
{std::make_tuple(BackgroundErrorReason::kFlush, Status::Code::kIOError,
|
|
Status::SubCode::kNoSpace, true),
|
|
Status::Severity::kHardError},
|
|
{std::make_tuple(BackgroundErrorReason::kFlush, Status::Code::kIOError,
|
|
Status::SubCode::kNoSpace, false),
|
|
Status::Severity::kNoError},
|
|
{std::make_tuple(BackgroundErrorReason::kFlush, Status::Code::kIOError,
|
|
Status::SubCode::kSpaceLimit, true),
|
|
Status::Severity::kHardError},
|
|
// Errors during Write
|
|
{std::make_tuple(BackgroundErrorReason::kWriteCallback,
|
|
Status::Code::kIOError, Status::SubCode::kNoSpace,
|
|
true),
|
|
Status::Severity::kHardError},
|
|
{std::make_tuple(BackgroundErrorReason::kWriteCallback,
|
|
Status::Code::kIOError, Status::SubCode::kNoSpace,
|
|
false),
|
|
Status::Severity::kHardError},
|
|
};
|
|
|
|
std::map<std::tuple<BackgroundErrorReason, Status::Code, bool>, Status::Severity>
|
|
DefaultErrorSeverityMap = {
|
|
// Errors during BG compaction
|
|
{std::make_tuple(BackgroundErrorReason::kCompaction,
|
|
Status::Code::kCorruption, true),
|
|
Status::Severity::kUnrecoverableError},
|
|
{std::make_tuple(BackgroundErrorReason::kCompaction,
|
|
Status::Code::kCorruption, false),
|
|
Status::Severity::kNoError},
|
|
{std::make_tuple(BackgroundErrorReason::kCompaction,
|
|
Status::Code::kIOError, true),
|
|
Status::Severity::kFatalError},
|
|
{std::make_tuple(BackgroundErrorReason::kCompaction,
|
|
Status::Code::kIOError, false),
|
|
Status::Severity::kNoError},
|
|
// Errors during BG flush
|
|
{std::make_tuple(BackgroundErrorReason::kFlush,
|
|
Status::Code::kCorruption, true),
|
|
Status::Severity::kUnrecoverableError},
|
|
{std::make_tuple(BackgroundErrorReason::kFlush,
|
|
Status::Code::kCorruption, false),
|
|
Status::Severity::kNoError},
|
|
{std::make_tuple(BackgroundErrorReason::kFlush,
|
|
Status::Code::kIOError, true),
|
|
Status::Severity::kFatalError},
|
|
{std::make_tuple(BackgroundErrorReason::kFlush,
|
|
Status::Code::kIOError, false),
|
|
Status::Severity::kNoError},
|
|
// Errors during Write
|
|
{std::make_tuple(BackgroundErrorReason::kWriteCallback,
|
|
Status::Code::kCorruption, true),
|
|
Status::Severity::kUnrecoverableError},
|
|
{std::make_tuple(BackgroundErrorReason::kWriteCallback,
|
|
Status::Code::kCorruption, false),
|
|
Status::Severity::kNoError},
|
|
{std::make_tuple(BackgroundErrorReason::kWriteCallback,
|
|
Status::Code::kIOError, true),
|
|
Status::Severity::kFatalError},
|
|
{std::make_tuple(BackgroundErrorReason::kWriteCallback,
|
|
Status::Code::kIOError, false),
|
|
Status::Severity::kNoError},
|
|
};
|
|
|
|
std::map<std::tuple<BackgroundErrorReason, bool>, Status::Severity>
|
|
DefaultReasonMap = {
|
|
// Errors during BG compaction
|
|
{std::make_tuple(BackgroundErrorReason::kCompaction, true),
|
|
Status::Severity::kFatalError},
|
|
{std::make_tuple(BackgroundErrorReason::kCompaction, false),
|
|
Status::Severity::kNoError},
|
|
// Errors during BG flush
|
|
{std::make_tuple(BackgroundErrorReason::kFlush, true),
|
|
Status::Severity::kFatalError},
|
|
{std::make_tuple(BackgroundErrorReason::kFlush, false),
|
|
Status::Severity::kNoError},
|
|
// Errors during Write
|
|
{std::make_tuple(BackgroundErrorReason::kWriteCallback, true),
|
|
Status::Severity::kFatalError},
|
|
{std::make_tuple(BackgroundErrorReason::kWriteCallback, false),
|
|
Status::Severity::kFatalError},
|
|
// Errors during Memtable update
|
|
{std::make_tuple(BackgroundErrorReason::kMemTable, true),
|
|
Status::Severity::kFatalError},
|
|
{std::make_tuple(BackgroundErrorReason::kMemTable, false),
|
|
Status::Severity::kFatalError},
|
|
};
|
|
|
|
void ErrorHandler::CancelErrorRecovery() {
|
|
#ifndef ROCKSDB_LITE
|
|
db_mutex_->AssertHeld();
|
|
|
|
// We'll release the lock before calling sfm, so make sure no new
|
|
// recovery gets scheduled at that point
|
|
auto_recovery_ = false;
|
|
SstFileManagerImpl* sfm = reinterpret_cast<SstFileManagerImpl*>(
|
|
db_options_.sst_file_manager.get());
|
|
if (sfm) {
|
|
// This may or may not cancel a pending recovery
|
|
db_mutex_->Unlock();
|
|
bool cancelled = sfm->CancelErrorRecovery(this);
|
|
db_mutex_->Lock();
|
|
if (cancelled) {
|
|
recovery_in_prog_ = false;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// This is the main function for looking at an error during a background
|
|
// operation and deciding the severity, and error recovery strategy. The high
|
|
// level algorithm is as follows -
|
|
// 1. Classify the severity of the error based on the ErrorSeverityMap,
|
|
// DefaultErrorSeverityMap and DefaultReasonMap defined earlier
|
|
// 2. Call a Status code specific override function to adjust the severity
|
|
// if needed. The reason for this is our ability to recover may depend on
|
|
// the exact options enabled in DBOptions
|
|
// 3. Determine if auto recovery is possible. A listener notification callback
|
|
// is called, which can disable the auto recovery even if we decide its
|
|
// feasible
|
|
// 4. For Status::NoSpace() errors, rely on SstFileManagerImpl to control
|
|
// the actual recovery. If no sst file manager is specified in DBOptions,
|
|
// a default one is allocated during DB::Open(), so there will always be
|
|
// one.
|
|
// This can also get called as part of a recovery operation. In that case, we
|
|
// also track the error separately in recovery_error_ so we can tell in the
|
|
// end whether recovery succeeded or not
|
|
Status ErrorHandler::SetBGError(const Status& bg_err, BackgroundErrorReason reason) {
|
|
db_mutex_->AssertHeld();
|
|
|
|
if (bg_err.ok()) {
|
|
return Status::OK();
|
|
}
|
|
|
|
bool paranoid = db_options_.paranoid_checks;
|
|
Status::Severity sev = Status::Severity::kFatalError;
|
|
Status new_bg_err;
|
|
bool found = false;
|
|
|
|
{
|
|
auto entry = ErrorSeverityMap.find(std::make_tuple(reason, bg_err.code(),
|
|
bg_err.subcode(), paranoid));
|
|
if (entry != ErrorSeverityMap.end()) {
|
|
sev = entry->second;
|
|
found = true;
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
auto entry = DefaultErrorSeverityMap.find(std::make_tuple(reason,
|
|
bg_err.code(), paranoid));
|
|
if (entry != DefaultErrorSeverityMap.end()) {
|
|
sev = entry->second;
|
|
found = true;
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
auto entry = DefaultReasonMap.find(std::make_tuple(reason, paranoid));
|
|
if (entry != DefaultReasonMap.end()) {
|
|
sev = entry->second;
|
|
}
|
|
}
|
|
|
|
new_bg_err = Status(bg_err, sev);
|
|
|
|
// Check if recovery is currently in progress. If it is, we will save this
|
|
// error so we can check it at the end to see if recovery succeeded or not
|
|
if (recovery_in_prog_ && recovery_error_.ok()) {
|
|
recovery_error_ = new_bg_err;
|
|
}
|
|
|
|
bool auto_recovery = auto_recovery_;
|
|
if (new_bg_err.severity() >= Status::Severity::kFatalError && auto_recovery) {
|
|
auto_recovery = false;
|
|
}
|
|
|
|
// Allow some error specific overrides
|
|
if (new_bg_err == Status::NoSpace()) {
|
|
new_bg_err = OverrideNoSpaceError(new_bg_err, &auto_recovery);
|
|
}
|
|
|
|
if (!new_bg_err.ok()) {
|
|
Status s = new_bg_err;
|
|
EventHelpers::NotifyOnBackgroundError(db_options_.listeners, reason, &s,
|
|
db_mutex_, &auto_recovery);
|
|
if (!s.ok() && (s.severity() > bg_error_.severity())) {
|
|
bg_error_ = s;
|
|
} else {
|
|
// This error is less severe than previously encountered error. Don't
|
|
// take any further action
|
|
return bg_error_;
|
|
}
|
|
}
|
|
|
|
if (auto_recovery) {
|
|
recovery_in_prog_ = true;
|
|
|
|
// Kick-off error specific recovery
|
|
if (bg_error_ == Status::NoSpace()) {
|
|
RecoverFromNoSpace();
|
|
}
|
|
}
|
|
return bg_error_;
|
|
}
|
|
|
|
Status ErrorHandler::OverrideNoSpaceError(Status bg_error,
|
|
bool* auto_recovery) {
|
|
#ifndef ROCKSDB_LITE
|
|
if (bg_error.severity() >= Status::Severity::kFatalError) {
|
|
return bg_error;
|
|
}
|
|
|
|
if (db_options_.sst_file_manager.get() == nullptr) {
|
|
// We rely on SFM to poll for enough disk space and recover
|
|
*auto_recovery = false;
|
|
return bg_error;
|
|
}
|
|
|
|
if (db_options_.allow_2pc &&
|
|
(bg_error.severity() <= Status::Severity::kSoftError)) {
|
|
// Don't know how to recover, as the contents of the current WAL file may
|
|
// be inconsistent, and it may be needed for 2PC. If 2PC is not enabled,
|
|
// we can just flush the memtable and discard the log
|
|
*auto_recovery = false;
|
|
return Status(bg_error, Status::Severity::kFatalError);
|
|
}
|
|
|
|
{
|
|
uint64_t free_space;
|
|
if (db_options_.env->GetFreeSpace(db_options_.db_paths[0].path,
|
|
&free_space) == Status::NotSupported()) {
|
|
*auto_recovery = false;
|
|
}
|
|
}
|
|
|
|
return bg_error;
|
|
#else
|
|
(void)auto_recovery;
|
|
return Status(bg_error, Status::Severity::kFatalError);
|
|
#endif
|
|
}
|
|
|
|
void ErrorHandler::RecoverFromNoSpace() {
|
|
#ifndef ROCKSDB_LITE
|
|
SstFileManagerImpl* sfm =
|
|
reinterpret_cast<SstFileManagerImpl*>(db_options_.sst_file_manager.get());
|
|
|
|
// Inform SFM of the error, so it can kick-off the recovery
|
|
if (sfm) {
|
|
sfm->StartErrorRecovery(this, bg_error_);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
Status ErrorHandler::ClearBGError() {
|
|
#ifndef ROCKSDB_LITE
|
|
db_mutex_->AssertHeld();
|
|
|
|
// Signal that recovery succeeded
|
|
if (recovery_error_.ok()) {
|
|
Status old_bg_error = bg_error_;
|
|
bg_error_ = Status::OK();
|
|
recovery_in_prog_ = false;
|
|
EventHelpers::NotifyOnErrorRecoveryCompleted(db_options_.listeners,
|
|
old_bg_error, db_mutex_);
|
|
}
|
|
return recovery_error_;
|
|
#else
|
|
return bg_error_;
|
|
#endif
|
|
}
|
|
|
|
Status ErrorHandler::RecoverFromBGError(bool is_manual) {
|
|
#ifndef ROCKSDB_LITE
|
|
InstrumentedMutexLock l(db_mutex_);
|
|
if (is_manual) {
|
|
// If its a manual recovery and there's a background recovery in progress
|
|
// return busy status
|
|
if (recovery_in_prog_) {
|
|
return Status::Busy();
|
|
}
|
|
recovery_in_prog_ = true;
|
|
}
|
|
|
|
if (bg_error_.severity() == Status::Severity::kSoftError) {
|
|
// Simply clear the background error and return
|
|
recovery_error_ = Status::OK();
|
|
return ClearBGError();
|
|
}
|
|
|
|
// Reset recovery_error_. We will use this to record any errors that happen
|
|
// during the recovery process. While recovering, the only operations that
|
|
// can generate background errors should be the flush operations
|
|
recovery_error_ = Status::OK();
|
|
Status s = db_->ResumeImpl();
|
|
// For manual recover, shutdown, and fatal error cases, set
|
|
// recovery_in_prog_ to false. For automatic background recovery, leave it
|
|
// as is regardless of success or failure as it will be retried
|
|
if (is_manual || s.IsShutdownInProgress() ||
|
|
bg_error_.severity() >= Status::Severity::kFatalError) {
|
|
recovery_in_prog_ = false;
|
|
}
|
|
return s;
|
|
#else
|
|
(void)is_manual;
|
|
return bg_error_;
|
|
#endif
|
|
}
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
|