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wal: limit number of tmp file names 

This fixes a space leak if the etcd server is restarted in shorter and shorter
intervals causing the tmp files to stack up.
release-3.0
Anthony Romano 2016-05-28 20:28:26 -07:00
parent 71a9d6fc8b
commit 05cc3c3dbb
1 changed files with 4 additions and 2 deletions
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6
wal/file_pipeline.go
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@ -48,7 +48,8 @@ func newFilePipeline(dir string, fileSize int64) *filePipeline {
return fp
}
// Open returns a fresh file for writing
// Open returns a fresh file for writing. Rename the file before calling
// Open again or there will be file collisions.
func (fp *filePipeline) Open() (f *fileutil.LockedFile, err error) {
select {
case f = <-fp.filec:
@ -63,7 +64,8 @@ func (fp *filePipeline) Close() error {
}
func (fp *filePipeline) alloc() (f *fileutil.LockedFile, err error) {
fpath := path.Join(fp.dir, fmt.Sprintf("%d.tmp", fp.count))
// count % 2 so this file isn't the same as the one last published
fpath := path.Join(fp.dir, fmt.Sprintf("%d.tmp", fp.count%2))
if f, err = fileutil.LockFile(fpath, os.O_CREATE|os.O_WRONLY, 0600); err != nil {
return nil, err
}