[fix](doc) clarify computation BE role behavior across storage modes#3758
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A computation-type BE node only serves data lake (external table) queries; querying internal tables on a cluster where all BEs are computation fails with "has no queryable replicas". The previous doc claimed the role was for storage-compute integrated mode only, which is wrong — it works in both modes, but with the same external-only restriction. Also document that SHOW BACKENDS always shows NodeRole=mix in storage-compute separation mode, regardless of the be_node_role config. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Under WSL2 the per-distribution loopback prevents FE and BE from reaching each other via 127.0.0.1, so the default priority_networks=127.0.0.1/32 leaves BE unable to join the cluster. Add a FAQ entry in the quick-start guide (zh-CN / en, current / 4.x) explaining the cause and pointing users to set priority_networks to their WSL interface subnet. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
computation-type BE node only serves data lake (external table) queries — it never serves internal table queries. If every BE in the cluster iscomputation, internal-table queries fail withhas no queryable replicas.:::cautionadmonition warning about:has no queryable replicasfailure when all BEs arecomputationSHOW BACKENDSalways showingNodeRole = mixin storage-compute separation mode regardless ofbe_node_role(a real-world user got confused by this and changed their config the wrong way)Updates the four file copies that contain this section: zh-CN
current+ zh-CNversion-4.x, Englishcurrent(docs/) + Englishversion-4.x(versioned_docs/).Test plan
:::cautionadmonition renders correctly in both languages