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llama-server: friendlier error msg when ctx < input #18174

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Merged
ngxson merged 3 commits into from
Dec 19, 2025
+17 −3
Merged

llama-server: friendlier error msg when ctx < input #18174

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56c8222
llama-server: friendlier error msg when ctx < input
am17an Dec 15, 2025
c6417bd
llama-server: use string_format inline
am17an Dec 18, 2025
0141889
fix test
am17an Dec 19, 2025
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20 changes: 17 additions & 3 deletions tools/server/server-context.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1962,19 +1962,33 @@ struct server_context_impl {

if (!slot.can_split()) {
if (slot.task->n_tokens() > n_ubatch) {
send_error(slot, "input is too large to process. increase the physical batch size", ERROR_TYPE_SERVER);
send_error(slot,
string_format(
"input (%d tokens) is too large to process. increase the physical batch "
"size (current batch size: %d)",
slot.task->n_tokens(), n_ubatch),
ERROR_TYPE_SERVER);
slot.release();
continue;
}

if (slot.task->n_tokens() > slot.n_ctx) {
send_error(slot, "input is larger than the max context size. skipping", ERROR_TYPE_EXCEED_CONTEXT_SIZE);
send_error(
slot,
string_format(
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@ngxson ngxson Dec 18, 2025 •
edited
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just wondering if this is actually needed, because the info about n_tokens and n_ctx already included inside the response (ad dedicated fields, not in the error message)

Edit: hmm ok the CLI doesn't read these fields. I think we can merge this quick fix and I'll refactor this error handling later

"input (%d tokens) is larger than the max context size (%d tokens). skipping",
slot.task->n_tokens(), slot.n_ctx),
ERROR_TYPE_EXCEED_CONTEXT_SIZE);
slot.release();
continue;
}
} else {
if (slot.task->n_tokens() >= slot.n_ctx) {
send_error(slot, "the request exceeds the available context size, try increasing it", ERROR_TYPE_EXCEED_CONTEXT_SIZE);
send_error(slot,
string_format("request (%d tokens) exceeds the available context size (%d "
"tokens), try increasing it",
slot.task->n_tokens(), slot.n_ctx),
ERROR_TYPE_EXCEED_CONTEXT_SIZE);
slot.release();
continue;
}
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