[MCOL-4265] /tmp/columnstore_tmp_files permissions problem Created: 2020-08-22  Updated: 2020-09-21  Resolved: 2020-09-01

Status: Closed
Project: MariaDB ColumnStore
Component/s: None
Affects Version/s: 1.5.3
Fix Version/s: 5.4.1

Type: Bug Priority: Critical
Reporter: Todd Stoffel (Inactive) Assignee: Daniel Lee (Inactive)
Resolution: Fixed Votes: 0
Labels: None

Issue Links:
Duplicate
duplicates MCOL-4246 ControllerSegmentTable: RWLock() thre... Closed

 Description   

Inability to write to rdwrscratch folder is causing a crash in mysqld.

terminate called after throwing an instance of 'boost::filesystem::filesystem_error'
  what():  boost::filesystem::status: Permission denied: "/tmp/columnstore_tmp_files/rdwrscratch"
200822  6:22:04 [ERROR] mysqld got signal 6 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.
To report this bug, see https://mariadb.com/kb/en/reporting-bugs
We will try our best to scrape up some info that will hopefully help
diagnose the problem, but since we have already crashed,
something is definitely wrong and this may fail.
Server version: 10.5.6-MariaDB-log
key_buffer_size=134217728
read_buffer_size=131072
max_used_connections=10
max_threads=153
thread_count=12
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467560 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
Thread pointer: 0x7f1876607b98
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 0x7f18a6e48408 thread_stack 0x49000
??:0(my_print_stacktrace)[0x55bc34c157ae]
??:0(handle_fatal_signal)[0x55bc34769a15]
sigaction.c:0(__restore_rt)[0x7f18ab7e9dd0]
:0(__GI_raise)[0x7f18a958870f]
:0(__GI_abort)[0x7f18a9572b25]
/lib64/libstdc++.so.6(+0x9006b)[0x7f18a9d2506b]
??:0(std::rethrow_exception(std::__exception_ptr::exception_ptr))[0x7f18a9d2b50c]
??:0(std::terminate())[0x7f18a9d2b567]
??:0(__cxa_throw)[0x7f18a9d2b7c8]
/lib64/libboost_filesystem.so.1.66.0(+0x89e6)[0x7f1898d3d9e6]
??:0(idbdatafile::IDBPolicy::init(bool, bool, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, long))[0x7f189a15af1d]
??:0(idbdatafile::IDBPolicy::configIDBPolicy())[0x7f189a15bd3f]
??:0(WriteEngine::Config::checkReload())[0x7f189d224dc4]
??:0(WriteEngine::Config::initConfigCache())[0x7f189d226191]
??:0(is_columnstore_files_plugin_init(void*))[0x7f189df9f5e4]
??:0(is_columnstore_files_plugin_init(void*))[0x7f189dfa08c8]
??:0(get_schema_tables_result(JOIN*, enum_schema_table_state))[0x55bc346021d2]
??:0(JOIN::exec_inner())[0x55bc345e9437]
??:0(JOIN::exec())[0x55bc345e9a07]
??:0(mysql_select(THD*, TABLE_LIST*, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*))[0x55bc345e7d52]
??:0(handle_select(THD*, LEX*, select_result*, unsigned long))[0x55bc345e869e]
??:0(LEX::mark_first_table_as_inserting())[0x55bc3458a9f3]
??:0(mysql_execute_command(THD*))[0x55bc34592d08]
??:0(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x55bc34586448]
??:0(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x55bc345903fd]
??:0(do_command(THD*))[0x55bc345912b1]
??:0(do_handle_one_connection(CONNECT*, bool))[0x55bc346760f6]
??:0(handle_one_connection)[0x55bc346763dd]
pthread_create.c:0(start_thread)[0x7f18ab7df2de]
:0(__GI___clone)[0x7f18a964ce83]
Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x7f1876638ab0): SELECT `OBJECT_ID`, `SEGMENT_ID`, `PARTITION_ID`, `FILENAME`, `FILE_SIZE`, `COMPRESSED_DATA_SIZE` FROM `information_schema`.`COLUMNSTORE_FILES`  LIMIT 100 OFFSET 0
Connection ID (thread ID): 22
Status: NOT_KILLED
Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off
The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ contains
information that should help you find out what is causing the crash.
Writing a core file...
Working directory at /var/lib/mysql
Resource Limits:
Limit                     Soft Limit           Hard Limit           Units
Max cpu time              unlimited            unlimited            seconds
Max file size             unlimited            unlimited            bytes
Max data size             unlimited            unlimited            bytes
Max stack size            8388608              unlimited            bytes
Max core file size        0                    unlimited            bytes
Max resident set          unlimited            unlimited            bytes
Max processes             unlimited            unlimited            processes
Max open files            1048576              1048576              files
Max locked memory         83968000             83968000             bytes
Max address space         unlimited            unlimited            bytes
Max file locks            unlimited            unlimited            locks
Max pending signals       31732                31732                signals
Max msgqueue size         819200               819200               bytes
Max nice priority         0                    0
Max realtime priority     0                    0
Max realtime timeout      unlimited            unlimited            us
Core pattern: core



 Comments   
Comment by Todd Stoffel (Inactive) [ 2020-08-22 ]

Work around:

chmod 755 /tmp/columnstore_tmp_files

However, this only works until the /tmp folder is cleaned via a process like "systemd-tmpfiles-clean.service" at which time Columnstore will probably create the folder again with incorrect permissions.

Comment by Daniel Lee (Inactive) [ 2020-09-01 ]

Build verified: 1.5.4-1 (drone #496)

1.5.3-1 directory permission
drw-rw-r-- 3 root root 4096 Sep 1 19:00 columnstore_tmp_files

1.5.4-1 directory permission

drwxrwxrwx 3 root root 4096 Sep 1 18:25 columnstore_tmp_files

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