RockteMQ-AI commented on issue #10591:
URL: https://github.com/apache/rocketmq/issues/10591#issuecomment-4902573689
**Issue Evaluation**
Category: `type/bug` | Status: **Confirmed**
The reported issue has been verified against the current codebase.
**Root Cause:** `NetworkUtil.string2SocketAddress()` uses `lastIndexOf(":")`
to split host and port. For IPv6 addresses in bracket notation (e.g.
`[240e:341:6246:c700:c4ad:e645:459e:2]:44880`), the host part retains the
brackets. When passed to `new InetSocketAddress("[240e:...]", port)`, the
address cannot be resolved, causing `getAddress()` to return `null`.
**Code path:**
1. `SendMessageActivity.java:300` — `context.getRemoteAddress()` returns the
IPv6 address with brackets from gRPC metadata
2. Stored as `PROPERTY_BORN_HOST` and forwarded to Broker
3. `NetworkUtil.string2SocketAddress()` (common module, line 194) parses
incorrectly
4. `CommitLog.asyncPutMessage()` (line 993-994) —
`bornSocketAddress.getAddress()` triggers NPE
**Impact:** All message sends through Proxy with IPv6 gRPC clients fail
**Severity:** High — complete message send failure in IPv6 Proxy deployments
**Affected code:**
- `common/src/main/java/org/apache/rocketmq/common/utils/NetworkUtil.java` —
`string2SocketAddress()`
- Also affects `RemotingHelper.string2SocketAddress()` in the remoting module
An automated fix proposal will be generated. Reply `/approve` to proceed
with PR generation.
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