revision-id: aa2a6b2f9bccbac97830aa30f0db13bd2cbe211c (mariadb-10.2.40-234-gaa2a6b2f9bc) parent(s): ad88c428c50e86cd78da2a9ecd027add2f9d6ff9 author: Sergei Petrunia committer: Sergei Petrunia timestamp: 2022-01-20 22:52:41 +0300 message: MDEV-27149: Add rocksdb_ignore_datadic_errors Add a --rocksdb_ignore_datadic_errors plugin option for MyRocks. The default is 0, and this means MyRocks will call abort() if it detects a DDL mismatch. Setting rocksdb_ignore_datadic_errors=1 makes MyRocks to try to ignore the errors and allow to start the server for repairs. --- storage/rocksdb/ha_rocksdb.cc | 50 ++++++++++++++++++++-- storage/rocksdb/ha_rocksdb.h | 2 + .../rocksdb/mysql-test/rocksdb/r/rocksdb.result | 1 + .../r/rocksdb_ignore_datadic_errors.result | 7 +++ .../t/rocksdb_ignore_datadic_errors.test | 6 +++ storage/rocksdb/rdb_datadic.cc | 6 +++ 6 files changed, 68 insertions(+), 4 deletions(-) diff --git a/storage/rocksdb/ha_rocksdb.cc b/storage/rocksdb/ha_rocksdb.cc index 1cb1a3517c5..b39db830323 100644 --- a/storage/rocksdb/ha_rocksdb.cc +++ b/storage/rocksdb/ha_rocksdb.cc @@ -637,6 +637,8 @@ static my_bool rocksdb_large_prefix = 0; static my_bool rocksdb_allow_to_start_after_corruption = 0; static char* rocksdb_git_hash; +uint32_t rocksdb_ignore_datadic_errors = 0; + char *compression_types_val= const_cast<char*>(get_rocksdb_supported_compression_types()); static unsigned long rocksdb_write_policy = @@ -1907,6 +1909,15 @@ static MYSQL_SYSVAR_UINT( nullptr, nullptr, 1 /* default value */, 0 /* min value */, 2 /* max value */, 0); +static MYSQL_SYSVAR_UINT( + ignore_datadic_errors, rocksdb_ignore_datadic_errors, + PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, + "Ignore MyRocks' data directory errors. " + "(CAUTION: Use only to start the server and perform repairs. Do NOT use " + "for regular operation)", + nullptr, nullptr, 0 /* default value */, 0 /* min value */, + 1 /* max value */, 0); + static MYSQL_SYSVAR_STR(datadir, rocksdb_datadir, PLUGIN_VAR_OPCMDARG | PLUGIN_VAR_READONLY, "RocksDB data directory", nullptr, nullptr, @@ -2142,6 +2153,8 @@ static struct st_mysql_sys_var *rocksdb_system_variables[] = { MYSQL_SYSVAR(rollback_on_timeout), MYSQL_SYSVAR(enable_insert_with_update_caching), + + MYSQL_SYSVAR(ignore_datadic_errors), nullptr}; static rocksdb::WriteOptions rdb_get_rocksdb_write_options( @@ -5176,6 +5189,13 @@ static int rocksdb_init_func(void *const p) { DBUG_RETURN(1); } + if (rocksdb_ignore_datadic_errors) + { + sql_print_information( + "CAUTION: Running with rocksdb_ignore_datadic_errors=1. " + " This should only be used to perform repairs"); + } + if (rdb_check_rocksdb_corruption()) { // NO_LINT_DEBUG sql_print_error( @@ -5607,7 +5627,14 @@ static int rocksdb_init_func(void *const p) { if (ddl_manager.init(&dict_manager, &cf_manager, rocksdb_validate_tables)) { // NO_LINT_DEBUG sql_print_error("RocksDB: Failed to initialize DDL manager."); - DBUG_RETURN(HA_EXIT_FAILURE); + + if (rocksdb_ignore_datadic_errors) + { + sql_print_error("RocksDB: rocksdb_ignore_datadic_errors=1, " + "trying to continue"); + } + else + DBUG_RETURN(HA_EXIT_FAILURE); } Rdb_sst_info::init(rdb); @@ -6674,9 +6701,18 @@ int ha_rocksdb::open(const char *const name, int mode, uint test_if_locked) { "MyRocks has %u (%s hidden pk)", table->s->keys, m_tbl_def->m_key_count, has_hidden_pk(table)? "1" : "no"); - my_error(ER_INTERNAL_ERROR, MYF(0), - "MyRocks: DDL mismatch. Check the error log for details"); - DBUG_RETURN(HA_ERR_ROCKSDB_INVALID_TABLE); + + if (rocksdb_ignore_datadic_errors) + { + sql_print_error("MyRocks: rocksdb_ignore_datadic_errors=1, " + "trying to continue"); + } + else + { + my_error(ER_INTERNAL_ERROR, MYF(0), + "MyRocks: DDL mismatch. Check the error log for details"); + DBUG_RETURN(HA_ERR_ROCKSDB_INVALID_TABLE); + } } @@ -11558,6 +11594,12 @@ void Rdb_drop_index_thread::run() { "from cf id %u. MyRocks data dictionary may " "get corrupted.", d.cf_id); + if (rocksdb_ignore_datadic_errors) + { + sql_print_error("RocksDB: rocksdb_ignore_datadic_errors=1, " + "trying to continue"); + continue; + } abort(); } rocksdb::ColumnFamilyHandle *cfh = cf_manager.get_cf(d.cf_id); diff --git a/storage/rocksdb/ha_rocksdb.h b/storage/rocksdb/ha_rocksdb.h index 4a379cd638a..b53ac851f4f 100644 --- a/storage/rocksdb/ha_rocksdb.h +++ b/storage/rocksdb/ha_rocksdb.h @@ -1059,6 +1059,8 @@ const int MYROCKS_MARIADB_PLUGIN_MATURITY_LEVEL= MariaDB_PLUGIN_MATURITY_STABLE; extern bool prevent_myrocks_loading; +extern uint32_t rocksdb_ignore_datadic_errors; + void sql_print_verbose_info(const char *format, ...); } // namespace myrocks diff --git a/storage/rocksdb/mysql-test/rocksdb/r/rocksdb.result b/storage/rocksdb/mysql-test/rocksdb/r/rocksdb.result index 11cffac070f..71ec4d2344d 100644 --- a/storage/rocksdb/mysql-test/rocksdb/r/rocksdb.result +++ b/storage/rocksdb/mysql-test/rocksdb/r/rocksdb.result @@ -932,6 +932,7 @@ rocksdb_force_flush_memtable_now OFF rocksdb_force_index_records_in_range 0 rocksdb_git_hash # rocksdb_hash_index_allow_collision ON +rocksdb_ignore_datadic_errors 0 rocksdb_ignore_unknown_options ON rocksdb_index_type kBinarySearch rocksdb_info_log_level error_level diff --git a/storage/rocksdb/mysql-test/rocksdb_sys_vars/r/rocksdb_ignore_datadic_errors.result b/storage/rocksdb/mysql-test/rocksdb_sys_vars/r/rocksdb_ignore_datadic_errors.result new file mode 100644 index 00000000000..daa70a80683 --- /dev/null +++ b/storage/rocksdb/mysql-test/rocksdb_sys_vars/r/rocksdb_ignore_datadic_errors.result @@ -0,0 +1,7 @@ +SET @start_global_value = @@global.ROCKSDB_IGNORE_DATADIC_ERRORS; +SELECT @start_global_value; +@start_global_value +0 +"Trying to set variable @@global.ROCKSDB_IGNORE_DATADIC_ERRORS to 444. It should fail because it is readonly." +SET @@global.ROCKSDB_IGNORE_DATADIC_ERRORS = 444; +ERROR HY000: Variable 'rocksdb_ignore_datadic_errors' is a read only variable diff --git a/storage/rocksdb/mysql-test/rocksdb_sys_vars/t/rocksdb_ignore_datadic_errors.test b/storage/rocksdb/mysql-test/rocksdb_sys_vars/t/rocksdb_ignore_datadic_errors.test new file mode 100644 index 00000000000..b412a018869 --- /dev/null +++ b/storage/rocksdb/mysql-test/rocksdb_sys_vars/t/rocksdb_ignore_datadic_errors.test @@ -0,0 +1,6 @@ +--source include/have_rocksdb.inc + +--let $sys_var=ROCKSDB_IGNORE_DATADIC_ERRORS +--let $read_only=1 +--let $session=0 +--source include/rocksdb_sys_var.inc diff --git a/storage/rocksdb/rdb_datadic.cc b/storage/rocksdb/rdb_datadic.cc index 31bc40b1df9..45bb665654c 100644 --- a/storage/rocksdb/rdb_datadic.cc +++ b/storage/rocksdb/rdb_datadic.cc @@ -5240,6 +5240,12 @@ void Rdb_dict_manager::log_start_drop_index(GL_INDEX_ID gl_index_id, "from index id (%u,%u). MyRocks data dictionary may " "get corrupted.", gl_index_id.cf_id, gl_index_id.index_id); + if (rocksdb_ignore_datadic_errors) + { + sql_print_error("RocksDB: rocksdb_ignore_datadic_errors=1, " + "trying to continue"); + return; + } abort(); } }