| Bug #27651 | Very high load can cause event api to get out of sync, "out of order buckets" | ||
|---|---|---|---|
| Submitted: | 4 Apr 2007 13:54 | Modified: | 17 Apr 2007 11:44 |
| Reporter: | Jonas Oreland | Email Updates: | |
| Status: | Closed | Impact on me: | |
| Category: | MySQL Cluster: Replication | Severity: | S3 (Non-critical) |
| Version: | 5.0-wl2325-5.0, 5.1* | OS: | Any |
| Assigned to: | Jonas Oreland | CPU Architecture: | Any |
[10 Apr 2007 8:12]
Bugs System
A patch for this bug has been committed. After review, it may be pushed to the relevant source trees for release in the next version. You can access the patch from: http://lists.mysql.com/commits/24124 ChangeSet@1.2137, 2007-04-10 10:10:34+02:00, jonas@perch.ndb.mysql.com +1 -0 ndb - bug#27651 (wl2325-5.0) Only prepare "next" GCI if we're in the first 4 highest GCI's to avoid we can get several buckets with same GCI
[10 Apr 2007 8:17]
Bugs System
A patch for this bug has been committed. After review, it may be pushed to the relevant source trees for release in the next version. You can access the patch from: http://lists.mysql.com/commits/24127 ChangeSet@1.2453, 2007-04-10 10:15:35+02:00, jonas@perch.ndb.mysql.com +1 -0 ndb - bug#27651 (5.1) Only prepare "next" GCI if we're in the first 4 highest GCI's to avoid we can get several buckets with same GCI
[15 Apr 2007 16:48]
Bugs System
Pushed into 5.1.18-beta
[17 Apr 2007 11:44]
Jon Stephens
Thank you for your bug report. This issue has been committed to our source repository of that product and will be incorporated into the next release.
If necessary, you can access the source repository and build the latest available version, including the bug fix. More information about accessing the source trees is available at
http://dev.mysql.com/doc/en/installing-source.html
Documented bugfix in 5.1.18 and telco-6.1.6 changelogs.
Description: . How to repeat: . Suggested fix: ===== storage/ndb/src/ndbapi/NdbEventOperationImpl.cpp 1.26 vs edited ===== --- 1.26/storage/ndb/src/ndbapi/NdbEventOperationImpl.cpp 2007-04-04 15:53:18 +02:00 +++ storage/ndb/src/ndbapi/NdbEventOperationImpl.cpp 2007-04-04 15:52:43 +02:00 @@ -533,7 +533,7 @@ NdbEventBuffer::NdbEventBuffer(Ndb *ndb) : m_system_nodes(ndb->theImpl->theNoOfDBnodes), m_ndb(ndb), - m_latestGCI(0), + m_latestGCI(0), m_latest_complete_GCI(0) m_total_alloc(0), m_free_thresh(10), m_min_free_thresh(10), @@ -856,6 +856,7 @@ const Uint32 cnt= rep->gcp_complete_rep_count; Gci_container *bucket = find_bucket(&m_active_gci, gci); + Uint32 idx = bucket - m_active_gci.getBase(); if (unlikely(bucket == 0)) { @@ -895,8 +896,20 @@ } reportStatus(); bzero(bucket, sizeof(Gci_container)); - bucket->m_gci = gci + ACTIVE_GCI_DIRECTORY_SIZE; - bucket->m_gcp_complete_rep_count = m_system_nodes; + if (likely(idx < ACTIVE_GCI_DIRECTORY_SIZE)) + { + /** + * Only "prepare" next GCI if we're in + * the first 4 highest GCI's...else + * this is somekind of "late" GCI... + * which is only initialized to 0 + * + * This to make sure we dont get several buckets with same GCI + */ + bucket->m_gci = gci + ACTIVE_GCI_DIRECTORY_SIZE; + bucket->m_gcp_complete_rep_count = m_system_nodes; + } + if(unlikely(m_latest_complete_GCI > gci)) { complete_outof_order_gcis();