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revert a previous change that caused existing system collections on a slave to be truncated instead of being deleted (#8443) 

truncating instead of deleting introduced the possibility of the collection's indexes continuing to exist with different ids on the slave than on the master, leading to potential follow-up problems
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Jan 2019-03-18 20:56:50 +01:00 committed by GitHub
parent 472d83eb87
commit f621fe6076
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1 changed files with 4 additions and 3 deletions
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7
arangod/Replication/DatabaseInitialSyncer.cpp
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@ -1128,9 +1128,10 @@ Result DatabaseInitialSyncer::handleCollection(VPackSlice const& parameters,
if (col != nullptr) { if (col != nullptr) {
bool truncate = false; bool truncate = false;
if (col->system()) { if (col->name() == TRI_COL_NAME_USERS) {
// better not throw away system collections. otherwise they may be dropped // better not throw away the _users collection. otherwise it is gone
// and this can be a problem if the server crashes before they are recreated. // and this may be a problem if the
// server crashes in-between.
truncate = true; truncate = true;
} }