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Add duplicate event detection & logging.

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When an event is sent to a slave, we store information about the
event and who sent it, so that we can detect if the same event is
sent twice. If a duplicate event is detected, we log information
about it.
This commit is contained in:
Johan Wikman
2016-03-18 12:50:28 +02:00
parent f551099af9
commit 51e60000dd
3 changed files with 70 additions and 8 deletions
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19
server/modules/include/blr.h
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@ -308,6 +308,12 @@ typedef struct
int minavgs[BLR_NSTATS_MINUTES];
} SLAVE_STATS;
typedef enum blr_thread_role
{
BLR_THREAD_ROLE_MASTER,
BLR_THREAD_ROLE_SLAVE
} blr_thread_role_t;
/**
* The client session structure used within this router. This represents
* the slaves that are replicating binlogs from MaxScale.
@ -350,6 +356,11 @@ typedef struct router_slave
int heartbeat; /*< Heartbeat in seconds */
uint8_t lastEventReceived; /*< Last event received */
time_t lastReply; /*< Last event sent */
// lsi: Last Sent Information
blr_thread_role_t lsi_sender_role; /*< Master or slave code sent */
THREAD lsi_sender_tid; /*< Who sent */
char lsi_binlog_name[BINLOG_FNAMELEN + 1]; /*< Which binlog file */
uint32_t lsi_binlog_pos; /*< What position */
#if defined(SS_DEBUG)
skygw_chk_t rses_chk_tail;
#endif
@ -605,4 +616,12 @@ extern int blr_ping(ROUTER_INSTANCE *, ROUTER_SLAVE *, GWBUF *);
extern int blr_send_custom_error(DCB *, int, int, char *, char *, unsigned int);
extern int blr_file_next_exists(ROUTER_INSTANCE *, ROUTER_SLAVE *);
uint32_t extract_field(uint8_t *src, int bits);
extern bool blr_send_event(blr_thread_role_t role,
const char* binlog_name,
uint32_t binlog_pos,
ROUTER_SLAVE *slave,
REP_HEADER *hdr,
uint8_t *buf);
#endif