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rgwlc: correctly dimension lc shard index vector

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The new parallel lc code relies on a vector of indexes to seed
random-order shard processing.  This vector was dimensioned to
n (the shard count) - 1--which appears to elide the high index.

Found and reported by Ji Weiqiang <badwolflord@163.com>

Fixes: https://tracker.ceph.com/issues/48255

Signed-off-by: Matt Benjamin <mbenjamin@redhat.com>
This commit is contained in:
Matt Benjamin 2020-11-16 20:20:05 -05:00
parent 8d4a8735c3
commit 988c35b374
1 changed files with 1 additions and 1 deletions
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2
src/rgw/rgw_lc.cc
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@ -1658,7 +1658,7 @@ int RGWLC::list_lc_progress(string& marker, uint32_t max_entries,
static inline vector<int> random_sequence(uint32_t n)
{
vector<int> v(n-1, 0);
vector<int> v(n, 0);
std::generate(v.begin(), v.end(),
[ix = 0]() mutable {
return ix++;