apache/incubator-seata · error · NullPointerException

bytes is null

Error message

bytes is null

What it means

Thrown by ZstdUtil.compress when the input byte array is null. The zstd compressor delegates to the native Zstd bindings after the null guard; null input is rejected with NullPointerException('bytes is null') because the native call would otherwise crash the JVM.

Source

Thrown at compressor/seata-compressor-zstd/src/main/java/org/apache/seata/compressor/zstd/ZstdUtil.java:34

 */
package org.apache.seata.compressor.zstd;

import com.github.luben.zstd.Zstd;
import com.github.luben.zstd.ZstdInputStream;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

/**
 * the Zstd Util
 *
 */
public class ZstdUtil {

    public static byte[] compress(byte[] bytes) {
        if (bytes == null) {
            throw new NullPointerException("bytes is null");
        }

        return Zstd.compress(bytes);
    }

    public static byte[] decompress(byte[] bytes) {
        if (bytes == null) {
            throw new NullPointerException("bytes is null");
        }
        try (ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
                ZstdInputStream zis = new ZstdInputStream(bais);
                ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
            byte[] buffer = new byte[8192];
            int len;
            while ((len = zis.read(buffer)) > 0) {
                baos.write(buffer, 0, len);
            }
            return baos.toByteArray();

View on GitHub (pinned to e01f97c6db)

Solutions

1. Find the construction site of the null body and log the message type.
2. Use an empty array to represent an intentionally empty payload.
3. Add a null guard with context-rich error before compress.

Example fix

// before
byte[] out = ZstdUtil.compress(bytes);

// after
if (bytes == null) {
    throw new IllegalArgumentException("payload to zstd-compress is null");
}
byte[] out = ZstdUtil.compress(bytes);

if (bytes == null) {
    throw new IllegalArgumentException("payload to zstd-compress is null");
}

When it happens

Trigger: Calling ZstdUtil.compress(null) or the Compressor framework passing a null message body into the zstd path.

Common situations: Missing optional body on deserialized RPC messages; tests passing null; codec extension code that skips body population for some message types.

Related errors

• bytes is null
• bytes is null
• Failed to decompress zstd data
• gzip decompress error
• Zip compress error

AI-assisted analysis of apache/incubator-seata@e01f97c6db (2026-08-14). Data as JSON: /api/errors/c5c44da51be6ddec. Report an issue: GitHub.