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fix: dblink xid may be duplicated

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This commit is contained in:
obdev
2024-02-09 19:13:37 +00:00
committed by ob-robot
parent 1852c21cd5
commit 71301ab305
1 changed files with 24 additions and 19 deletions
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43
src/storage/tx/ob_xa_dblink_service.cpp
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@ -29,6 +29,11 @@ using namespace common::sqlclient;
namespace transaction
{
// generate a xid with new gtrid
// xid content:
// gtrid:
// base_version: "$tenant_id.$trans_id.$timestamp"
// using_ipv4: "$tenant_id.$trans_id.$timestamp,$ipv4"
// bqual: "10000"
// @param[out] new_xid
int ObXAService::generate_xid(const ObTransID &tx_id, ObXATransID &new_xid)
{
@ -37,19 +42,16 @@ int ObXAService::generate_xid(const ObTransID &tx_id, ObXATransID &new_xid)
static const ObString BQUAL_STRING = ObString("10000");
// gtrid
int64_t txid_value = tx_id.get_id();
static const char *DBLINK_STR = "DBLINK.";
static const int DBLINK_STR_LENGTH = 7;
char txid_str[ObXATransID::MAX_GTRID_LENGTH];
memset(txid_str, 0, ObXATransID::MAX_GTRID_LENGTH);
int txid_str_length = sprintf(txid_str, "%ld", txid_value);
if (ObXATransID::MAX_GTRID_LENGTH < txid_str_length + DBLINK_STR_LENGTH) {
uint64_t tenant_id = MTL_ID();
char gtrid_base_str[ObXATransID::MAX_GTRID_LENGTH] = {0};
int64_t timestamp = ObTimeUtility::current_time() / 1000000; // second level
const char *gtrid_base_format = "%llu.%lld.%lld";
int base_len = snprintf(gtrid_base_str, ObXATransID::MAX_GTRID_LENGTH, gtrid_base_format,
tenant_id, txid_value, timestamp);
if (ObXATransID::MAX_GTRID_LENGTH <= base_len || 0 > base_len) {
ret = OB_ERR_UNEXPECTED;
TRANS_LOG(WARN, "unexpected gtrid length", K(ret), K(txid_str_length));
TRANS_LOG(WARN, "unexpected gtrid length", K(ret), K(base_len));
} else {
char gtrid_str[ObXATransID::MAX_GTRID_LENGTH];
memset(gtrid_str, 0, ObXATransID::MAX_GTRID_LENGTH);
strncpy(gtrid_str, DBLINK_STR, DBLINK_STR_LENGTH);
strncpy(gtrid_str + DBLINK_STR_LENGTH, txid_str, txid_str_length);
ObString gtrid_string;
if (GCONF.self_addr_.using_ipv4()) {
char ip_port[MAX_IP_PORT_LENGTH];
@ -57,17 +59,20 @@ int ObXAService::generate_xid(const ObTransID &tx_id, ObXATransID &new_xid)
memset(ip_port, 0, MAX_IP_PORT_LENGTH);
if (OB_FAIL(GCONF.self_addr_.addr_to_buffer(ip_port, MAX_IP_PORT_LENGTH, ip_str_length))) {
TRANS_LOG(WARN, "convert server to string failed", K(ret), K(tx_id));
} else if (ObXATransID::MAX_GTRID_LENGTH < 1 + ip_str_length + txid_str_length + DBLINK_STR_LENGTH) {
ret = OB_ERR_UNEXPECTED;
TRANS_LOG(WARN, "unexpected gtrid length", K(ret), K(tx_id), K(txid_str_length), K(ip_port), K(ip_str_length));
} else {
const char *comma = ",";
strncpy(gtrid_str + DBLINK_STR_LENGTH + txid_str_length, comma, 1);
strncpy(gtrid_str + DBLINK_STR_LENGTH + txid_str_length + 1, ip_port, ip_str_length);
gtrid_string = ObString(DBLINK_STR_LENGTH + txid_str_length + 1 + ip_str_length, gtrid_str);
const char *gtrid_full_format = "%s,%s";
char gtrid_full_str[ObXATransID::MAX_GTRID_LENGTH] = {0};
int full_len = snprintf(gtrid_full_str, ObXATransID::MAX_GTRID_LENGTH, gtrid_full_format,
gtrid_base_str, ip_port);
if (ObXATransID::MAX_GTRID_LENGTH <= full_len || 0 > full_len) {
ret = OB_ERR_UNEXPECTED;
TRANS_LOG(WARN, "unexpected gtrid length", K(ret), K(full_len));
} else {
gtrid_string = ObString(full_len, gtrid_full_str);
}
}
} else {
gtrid_string = ObString(DBLINK_STR_LENGTH + txid_str_length, gtrid_str);
gtrid_string = ObString(base_len, gtrid_base_str);
}
if (OB_SUCC(ret)) {
ret = new_xid.set(gtrid_string, BQUAL_STRING, DBLINK_FORMAT_ID);