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The lsof utility is prone to blocking on system calls that it uses to obtain information about sockets (or files, devices, etc.). This behavior is described in its own documentation. It has a '-b' option (in combination with warnings suppression via '-w') that reduces the probability of blocking, introducing new problems (luckily probably not relevant for our use case). However, there is no guarantee that it will not hang on some distributions, with some TCP/IP stack implementations, or with some filesystems, etc. Also, of the three utilities that are suitable for our purposes, lsof is the slowest. So if there are other utilities that we use during SST, such as 'ss' or 'sockstat', it is reasonable to use them instead of lsof. This commit changes the prioritization of utilities, it does not need additional tests (besides the numerous SST tests already available in the galera suites). If the system still need to use lsof, this commit adds the '-b' and '-w' options to it command line - to reduce the likelihood of blocking. |
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| .. | ||
| CMakeLists.txt | ||
| comp_sql.c | ||
| convert-debug-for-diff.sh | ||
| dheadgen.pl | ||
| fill_help_tables.sql | ||
| galera_new_cluster.sh | ||
| galera_recovery.sh | ||
| maria_add_gis_sp.sql.in | ||
| mariadb-service-convert | ||
| msql2mysql.sh | ||
| mysql_config.pl.in | ||
| mysql_config.sh | ||
| mysql_convert_table_format.sh | ||
| mysql_find_rows.sh | ||
| mysql_fix_extensions.sh | ||
| mysql_install_db.sh | ||
| mysql_performance_tables.sql | ||
| mysql_secure_installation.sh | ||
| mysql_setpermission.sh | ||
| mysql_system_tables.sql | ||
| mysql_system_tables_data.sql | ||
| mysql_system_tables_fix.sql | ||
| mysql_test_data_timezone.sql | ||
| mysql_test_db.sql | ||
| mysqlaccess.conf | ||
| mysqlaccess.sh | ||
| mysqld_multi.sh | ||
| mysqld_safe.sh | ||
| mysqldumpslow.sh | ||
| mysqlhotcopy.sh | ||
| mytop.sh | ||
| wsrep_sst_backup.sh | ||
| wsrep_sst_common.sh | ||
| wsrep_sst_mariabackup.sh | ||
| wsrep_sst_mysqldump.sh | ||
| wsrep_sst_rsync.sh | ||