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new f1b6bc4da99 [fix](merge-on-write) remove some CHECKs in
Tablet::revise_tablet_meta (#31268)
f1b6bc4da99 is described below
commit f1b6bc4da9917c38109df8c87e3ad5e773dedaff
Author: zhannngchen <[email protected]>
AuthorDate: Wed May 8 15:02:41 2024 +0800
[fix](merge-on-write) remove some CHECKs in Tablet::revise_tablet_meta
(#31268)
---
be/src/olap/base_tablet.cpp | 31 ++++++++++++-----
be/src/olap/base_tablet.h | 5 +--
be/src/olap/tablet.cpp | 85 ++++++++++++++++++++++++++++++++++++++-------
3 files changed, 99 insertions(+), 22 deletions(-)
diff --git a/be/src/olap/base_tablet.cpp b/be/src/olap/base_tablet.cpp
index 74c8810e26e..aec5495262d 100644
--- a/be/src/olap/base_tablet.cpp
+++ b/be/src/olap/base_tablet.cpp
@@ -1368,13 +1368,19 @@ Status BaseTablet::check_rowid_conversion(
}
// The caller should hold _rowset_update_lock and _meta_lock lock.
-Status BaseTablet::update_delete_bitmap_without_lock(const BaseTabletSPtr&
self,
- const RowsetSharedPtr&
rowset) {
- DBUG_EXECUTE_IF("Tablet.update_delete_bitmap_without_lock.random_failed", {
- if (rand() % 100 < (100 * dp->param("percent", 0.1))) {
-
LOG_WARNING("Tablet.update_delete_bitmap_without_lock.random_failed");
+Status BaseTablet::update_delete_bitmap_without_lock(
+ const BaseTabletSPtr& self, const RowsetSharedPtr& rowset,
+ const std::vector<RowsetSharedPtr>* specified_base_rowsets) {
+
DBUG_EXECUTE_IF("BaseTablet.update_delete_bitmap_without_lock.random_failed", {
+ auto rnd = rand() % 100;
+ auto percent = dp->param("percent", 0.1);
+ if (rnd < (100 * percent)) {
+ LOG(WARNING) <<
"BaseTablet.update_delete_bitmap_without_lock.random_failed";
return Status::InternalError(
"debug tablet update delete bitmap without lock random
failed");
+ } else {
+ LOG(INFO) <<
"BaseTablet.update_delete_bitmap_without_lock.random_failed not triggered"
+ << ", rnd:" << rnd << ", percent: " << percent;
}
});
int64_t cur_version = rowset->end_version();
@@ -1387,12 +1393,21 @@ Status
BaseTablet::update_delete_bitmap_without_lock(const BaseTabletSPtr& self,
<< self->tablet_id() << " cur max_version: " << cur_version;
return Status::OK();
}
- RowsetIdUnorderedSet cur_rowset_ids;
- RETURN_IF_ERROR(self->get_all_rs_id_unlocked(cur_version - 1,
&cur_rowset_ids));
+
+ // calculate delete bitmap between segments if necessary.
DeleteBitmapPtr delete_bitmap =
std::make_shared<DeleteBitmap>(self->tablet_id());
RETURN_IF_ERROR(self->calc_delete_bitmap_between_segments(rowset,
segments, delete_bitmap));
- std::vector<RowsetSharedPtr> specified_rowsets =
self->get_rowset_by_ids(&cur_rowset_ids);
+ // get all base rowsets to calculate on
+ std::vector<RowsetSharedPtr> specified_rowsets;
+ RowsetIdUnorderedSet cur_rowset_ids;
+ if (specified_base_rowsets == nullptr) {
+ RETURN_IF_ERROR(self->get_all_rs_id_unlocked(cur_version - 1,
&cur_rowset_ids));
+ specified_rowsets = self->get_rowset_by_ids(&cur_rowset_ids);
+ } else {
+ specified_rowsets = *specified_base_rowsets;
+ }
+
OlapStopWatch watch;
auto token = self->calc_delete_bitmap_executor()->create_token();
RETURN_IF_ERROR(calc_delete_bitmap(self, rowset, segments,
specified_rowsets, delete_bitmap,
diff --git a/be/src/olap/base_tablet.h b/be/src/olap/base_tablet.h
index ea36ca8c47a..a157cd1e018 100644
--- a/be/src/olap/base_tablet.h
+++ b/be/src/olap/base_tablet.h
@@ -230,8 +230,9 @@ public:
const std::map<RowsetSharedPtr, std::list<std::pair<RowLocation,
RowLocation>>>&
location_map);
- static Status update_delete_bitmap_without_lock(const BaseTabletSPtr& self,
- const RowsetSharedPtr&
rowset);
+ static Status update_delete_bitmap_without_lock(
+ const BaseTabletSPtr& self, const RowsetSharedPtr& rowset,
+ const std::vector<RowsetSharedPtr>* specified_base_rowsets =
nullptr);
////////////////////////////////////////////////////////////////////////////
// end MoW functions
diff --git a/be/src/olap/tablet.cpp b/be/src/olap/tablet.cpp
index dfe1220ada8..a6f0202d1e3 100644
--- a/be/src/olap/tablet.cpp
+++ b/be/src/olap/tablet.cpp
@@ -330,11 +330,19 @@ Status Tablet::revise_tablet_meta(const
std::vector<RowsetSharedPtr>& to_add,
const std::vector<RowsetSharedPtr>&
to_delete,
bool is_incremental_clone) {
LOG(INFO) << "begin to revise tablet. tablet_id=" << tablet_id();
- delete_rowsets(to_delete, false);
- add_rowsets(to_add);
- // reconstruct from tablet meta
-
_timestamped_version_tracker.construct_versioned_tracker(_tablet_meta->all_rs_metas());
- if (keys_type() == UNIQUE_KEYS && enable_unique_key_merge_on_write()) {
+ // 1. for incremental clone, we have to add the rowsets first to make it
easy to compute
+ // all the delete bitmaps, and it's easy to delete them if we end up
with a failure
+ // 2. for full clone, we can calculate delete bitmaps on the cloned
rowsets directly.
+ if (is_incremental_clone) {
+ CHECK(to_delete.empty()); // don't need to delete rowsets
+ add_rowsets(to_add);
+ // reconstruct from tablet meta
+
_timestamped_version_tracker.construct_versioned_tracker(_tablet_meta->all_rs_metas());
+ }
+
+ Status calc_bm_status;
+ std::vector<RowsetSharedPtr> base_rowsets_for_full_clone = to_add; // copy
vector
+ while (keys_type() == UNIQUE_KEYS && enable_unique_key_merge_on_write()) {
std::vector<RowsetSharedPtr> calc_delete_bitmap_rowsets;
int64_t to_add_min_version = INT64_MAX;
int64_t to_add_max_version = INT64_MIN;
@@ -369,20 +377,73 @@ Status Tablet::revise_tablet_meta(const
std::vector<RowsetSharedPtr>& to_add,
}
if (calc_delete_bitmap_ver.first <= calc_delete_bitmap_ver.second) {
- Status res =
capture_consistent_rowsets_unlocked(calc_delete_bitmap_ver,
-
&calc_delete_bitmap_rowsets);
- // Because the data in memory has been changed, can't return an
error.
- CHECK(res.ok()) << "fail to capture_consistent_rowsets, res: " <<
res;
-
+ calc_bm_status =
capture_consistent_rowsets_unlocked(calc_delete_bitmap_ver,
+
&calc_delete_bitmap_rowsets);
+ if (!calc_bm_status.ok()) {
+ LOG(WARNING) << "fail to capture_consistent_rowsets, res: " <<
calc_bm_status;
+ break;
+ }
// FIXME(plat1ko): Use `const TabletSharedPtr&` as parameter
auto self = _engine.tablet_manager()->get_tablet(tablet_id());
CHECK(self);
for (auto rs : calc_delete_bitmap_rowsets) {
- res = update_delete_bitmap_without_lock(self, rs);
- CHECK(res.ok()) << "fail to update_delete_bitmap_without_lock,
res: " << res;
+ if (is_incremental_clone) {
+ calc_bm_status = update_delete_bitmap_without_lock(self,
rs);
+ } else {
+ calc_bm_status = update_delete_bitmap_without_lock(
+ self, rs, &base_rowsets_for_full_clone);
+ base_rowsets_for_full_clone.push_back(rs);
+ }
+ if (!calc_bm_status.ok()) {
+ LOG(WARNING) << "fail to
update_delete_bitmap_without_lock, res: "
+ << calc_bm_status;
+ break;
+ }
+ }
+ }
+ break; // while (keys_type() == UNIQUE_KEYS &&
enable_unique_key_merge_on_write())
+ }
+
+ // error handling
+ if (!calc_bm_status.ok()) {
+ if (is_incremental_clone) {
+ delete_rowsets(to_add, false);
+ LOG(WARNING) << "incremental clone on tablet: " << tablet_id() <<
" failed due to "
+ << calc_bm_status.msg() << ", revert " <<
to_add.size()
+ << " rowsets added before.";
+ } else {
+ LOG(WARNING) << "full clone on tablet: " << tablet_id() << "
failed due to "
+ << calc_bm_status.msg() << ", will not update tablet
meta.";
+ }
+ return calc_bm_status;
+ }
+
+ // full clone, calculate delete bitmap succeeded, update rowset
+ if (!is_incremental_clone) {
+ delete_rowsets(to_delete, false);
+ add_rowsets(to_add);
+ // reconstruct from tablet meta
+
_timestamped_version_tracker.construct_versioned_tracker(_tablet_meta->all_rs_metas());
+
+ // check the rowsets used for delete bitmap calculation is equal to
the rowsets
+ // that we can capture by version
+ if (keys_type() == UNIQUE_KEYS && enable_unique_key_merge_on_write()) {
+ Version full_version = Version(0, max_version_unlocked());
+ std::vector<RowsetSharedPtr> expected_rowsets;
+ auto st = capture_consistent_rowsets_unlocked(full_version,
&expected_rowsets);
+ DCHECK(st.ok()) << st;
+ DCHECK_EQ(base_rowsets_for_full_clone.size(),
expected_rowsets.size());
+ if (st.ok() && base_rowsets_for_full_clone.size() !=
expected_rowsets.size())
+ [[unlikely]] {
+ LOG(WARNING) << "full clone succeeded, but the count("
+ << base_rowsets_for_full_clone.size()
+ << ") of base rowsets used for delete bitmap
calculation is not match "
+ "expect count("
+ << expected_rowsets.size() << ") we capture from
tablet meta";
}
}
}
+
// clear stale rowset
for (auto& [v, rs] : _stale_rs_version_map) {
_engine.add_unused_rowset(rs);
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