MySQL cannot read data from the client pipe, breaking the session and returning SQLSTATE 08S01.
MySQL Error 1154: ER_NET_READ_ERROR_FROM_PIPE occurs when the server fails to read data from the client’s network pipe, aborting the connection. Fix it by checking network latency, increasing net_read_timeout, and ensuring the client keeps sending data.
Got a read error from the connection pipe
MySQL raises error 1154 with the message "Got a read error from the connection pipe" when the server fails to receive data that it expects from the client side of the TCP or named-pipe channel.
The server aborts the statement, returns SQLSTATE 08S01, and closes the session.
Connection loss can corrupt in-flight transactions and stall applications, so diagnosing and fixing the root cause quickly is critical.
Network latency, packet loss, or VPN instability often delays traffic long enough for net_read_timeout to expire.
Large result sets or BLOB inserts may exceed pipe or socket buffers, causing partial reads and triggering the error.
Antivirus or firewall software that scans traffic can momentarily block the data stream, making MySQL think the client stopped sending.
Operating-system resource exhaustion (file descriptors, epoll slots) can prevent MySQL from reading the socket.
First confirm the issue with SHOW GLOBAL STATUS LIKE 'Aborted_client'; An increasing counter signals read failures.
Test end-to-end network latency using ping and traceroute.
Repair unstable links or move the client closer to the server.
Temporarily raise net_read_timeout and net_write_timeout to give the client more time:
SET GLOBAL net_read_timeout = 120;
SET SESSION net_read_timeout = 120;
When transferring large objects, increase max_allowed_packet on both client and server.
Bulk data loads - Use LOCAL INFILE and chunk rows in batches under 1 MB.
Remote backups over slow WAN - Compress traffic with --compress or an SSH tunnel.
Windows named-pipe connections - Switch to TCP or raise Windows pipe buffer sizes.
Keep net_read_timeout proportional to typical round-trip time plus query execution time, usually 30-60 s on LAN.
Enable TCP keepalive so idle sockets stay open and detect dead peers quicker.
Monitor Aborted_client and Aborted_connect in Galaxy or another observability tool to alert before users notice failures.
Error 2013 (Lost connection to MySQL server during query) signals a similar read failure but after the query started returning rows.
Check network and timeouts.
Error 1158 (ER_NET_READ_ERROR) means the server read from the network socket, not a pipe. Fixes mirror those for 1154.
Error 1040 (Too many connections) can precipitate 1154 because delayed clients wait in queue until the pipe is closed. Tune max_connections.
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Yes. The server ends the session, rolling back uncommitted transactions. The client must reconnect.
No. You can modify it with SET GLOBAL for immediate effect, but the value resets on server restart unless placed in my.cnf.
Set net_read_timeout to 1, start a large SELECT, and pause the client with Ctrl-Z for longer than one second.
Galaxy logs query failures and surface Aborted_client metrics, letting teams spot connection drops and tune timeouts proactively.
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