CarGuo/GSYVideoPlayer · warning · ProxyCacheException

Error writing %d bytes to %s from buffer with size %d

Error message

Error writing %d bytes to %s from buffer with size %d

What it means

FileCache.close closes the RandomAccessFile and touches DiskUsage (updates last-modified for LRU). IOException from dataFile.close() is wrapped as 'Error closing file <path>'. Note close() is also called inside complete(), so this error can surface during completion as well as during release.

Source

Thrown at gsyVideoPlayer-proxy_cache/src/main/java/com/danikula/videocache/file/FileCache.java:73

            dataFile.seek(offset);
            return dataFile.read(buffer, 0, length);
        } catch (IOException e) {
            String format = "Error reading %d bytes with offset %d from file[%d bytes] to buffer[%d bytes]";
            throw new ProxyCacheException(String.format(format, length, offset, available(), buffer.length), e);
        }
    }

    @Override
    public synchronized void append(byte[] data, int length) throws ProxyCacheException {
        try {
            if (isCompleted()) {
                throw new ProxyCacheException("Error append cache: cache file " + file + " is completed!");
            }
            dataFile.seek(available());
            dataFile.write(data, 0, length);
        } catch (IOException e) {
            String format = "Error writing %d bytes to %s from buffer with size %d";
            throw new ProxyCacheException(String.format(format, length, dataFile, data.length), e);
        }
    }

    @Override
    public synchronized void close() throws ProxyCacheException {
        try {
            dataFile.close();
            diskUsage.touch(file);
        } catch (IOException e) {
            throw new ProxyCacheException("Error closing file " + file, e);
        }
    }

    @Override
    public synchronized void complete() throws ProxyCacheException {
        if (isCompleted()) {
            return;
        }

View on GitHub (pinned to e5d74d3aa9)

Solutions

1. Keep cache files on internal storage not visible to cleaner apps
2. Treat close-time errors during release()/shutdown() as log-only - the session is ending anyway
3. Ensure eviction does not delete the file whose FileCache is still open (one proxy instance per dir)
4. If seen during complete(), check disk health / remount state of the storage holding the cache

Example fix

// before
public void release() { fileCache.close(); }

// after - tolerate close failure during teardown
public void release() {
    try { fileCache.close(); }
    catch (ProxyCacheException e) { Log.w(TAG, "cache close failed during release", e); }
}

try { fileCache.close(); }
catch (ProxyCacheException e) {
    if (String.valueOf(e.getMessage()).contains("Error closing file")) {
        Log.w(TAG, "close failed during teardown", e); // swallow during release
    } else throw e;
}

When it happens

Trigger: Closing a RandomAccessFile whose fd is already invalid (file deleted by a cleaner/eviction underneath), or an IO error reported by the OS on close (NFS-ish storage, corrupted sdcard fs).

Common situations: Same family as errors 10/13: file removed mid-session, removable storage ejected, aggressive cache cleaners. Mostly seen as cleanup noise during player release rather than a functional failure.

Related errors

• Error reading source ${errorsCount} times
• Error using file ${file} as disc cache
• Error append cache: cache file %s is completed!
• Error renaming file %s to %s for completion!
• Reading source ${sourceInfo.url} is interrupted

AI-assisted analysis of CarGuo/GSYVideoPlayer@e5d74d3aa9 (2026-08-14). Data as JSON: /api/errors/0fdf07154ce45a51. Report an issue: GitHub.