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Chris LuandClaude Opus 5.5
4cb52d7705
* filer/leveldb_handle: reopen a database whose journal latched a write error goleveldb keeps the first journal write error and returns it for every later write until the database is reopened, so one transient ENOSPC or EIO fails all writes until a restart. The handle offers the leveldb.DB methods the stores use; a write that fails on an OS error probes the storage and, once it accepts writes and no call holds the database, closes and reopens it and retries the write once. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * filer: open the leveldb stores through leveldb_handle leveldb, leveldb2 and leveldb3 now recover from a transient storage write error without a restart. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * filer: leveldb stores return iterator errors from listings and deletes A listing on a database that cannot be read reported an empty directory, and DeleteFolderChildren wrote an empty batch, because the iterator error was never checked. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * filer/leveldb_handle: test a reopen that fails after the probe passes Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * filer/leveldb_handle: probe storage before draining readers A probe that stalls in Create, Write or Sync held mu exclusively and blocked every read on the handle. Reopen attempts are now serialized by their own mutex, and the probe runs before the drain. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * filer/leveldb_handle: hold new calls back while a reopen drains TryLock succeeds only at an instant with no reader, so overlapping listings could keep a reopen from ever draining while each write spun for the full drain timeout. The drain now holds new calls back for at most drainTimeout; a call nested inside a running one waits that out instead of deadlocking. A drain that times out holds off the next attempt for busyReopenInterval, so new calls are not held back over and over. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * filer/leveldb_handle: bound the wait for a running reopen A write that hit the latched error waited on the reopen mutex for as long as another caller's storage probe ran, so a stalled probe queued every writer. Callers now wait at most reopenWait and return their error, and still retry once a concurrent reopen succeeds. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * filer/leveldb_handle: tests wait for the drain and readers explicitly The nested-read test polled for a drain that could start and end between polls and then spun forever; it now syncs on the probe, widens the drain and fails if the put returns first. The overlapping-readers test waits until every reader holds an iterator before it writes. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>