fix: write error handling

CHANGELOG.md

@@ -2,6 +2,15 @@
 
 ## 1.11.0 [2026-08-27]
 
+### Bug Fixes
+
+1. [#425](https://github.com/InfluxCommunity/influxdb3-java/pull/425):
+      - Only throws `InfluxDBPartialWriteException` when:
+         - Error response status code is `400`.
+         - Error response format `{"error":"...","data":[{"error_message":"...","line_number":2,"original_line": "..."}]}` is returned with `data` must be an array.
+         - `accept_partial` is set to `true`.
+         - Write endpoint must be `api/v3/write_lp`.
+
 ### Breaking Changes
 
 1. [#407](https://github.com/InfluxCommunity/influxdb3-java/pull/407): Upgrade minimum JDK requirement to version 17.

src/main/java/com/influxdb/v3/client/InfluxDBPartialWriteException.java

@@ -62,49 +62,45 @@ public List<LineError> lineErrors() {
     }
 
     /**
-     * Represents one failed line from a partial write response.
-     */
-    public static final class LineError {
-
-        private final Integer lineNumber;
-        private final String errorMessage;
-        private final String originalLine;
-
-        /**
-         * @param lineNumber  line number in the write payload; may be null if not provided by server
-         * @param errorMessage line-level error message
-         * @param originalLine original line protocol row; may be null if not provided by server
+         * Represents one failed line from a partial write response.
          */
-        public LineError(@Nullable final Integer lineNumber,
-                         @Nonnull final String errorMessage,
-                         @Nullable final String originalLine) {
-            this.lineNumber = lineNumber;
-            this.errorMessage = errorMessage;
-            this.originalLine = originalLine;
-        }
+        public record LineError(Integer lineNumber, String errorMessage, String originalLine) {
 
-        /**
-         * @return line number or null if server didn't provide it
-         */
-        @Nullable
-        public Integer lineNumber() {
-            return lineNumber;
-        }
+            /**
+             * @param lineNumber   line number in the write payload; may be null if not provided by server
+             * @param errorMessage line-level error message
+             * @param originalLine original line protocol row; may be null if not provided by server
+             */
+            public LineError(@Nullable final Integer lineNumber,
+                             @Nonnull final String errorMessage,
+                             @Nullable final String originalLine) {
+                this.lineNumber = lineNumber;
+                this.errorMessage = errorMessage;
+                this.originalLine = originalLine;
+            }
 
-        /**
-         * @return line-level error message
-         */
-        @Nonnull
-        public String errorMessage() {
-            return errorMessage;
-        }
+            /**
+             * @return line number or null if server didn't provide it
+             */
+            @Nullable
+            public Integer lineNumber() {
+                return lineNumber;
+            }
 
-        /**
-         * @return original line protocol row or null if server didn't provide it
-         */
-        @Nullable
-        public String originalLine() {
-            return originalLine;
+            /**
+             * @return line-level error message
+             */
+            @Nonnull
+            public String errorMessage() {
+                return errorMessage;
+            }
+
+            /**
+             * @return original line protocol row or null if server didn't provide it
+             */
+            @Nullable
+            public String originalLine() {
+                return originalLine;
+            }
         }
-    }
 }

src/main/java/com/influxdb/v3/client/internal/InfluxDBClientImpl.java

@@ -384,7 +384,7 @@ private <T> void writeData(@Nonnull final List<T> data, @Nonnull final WriteOpti
         headers.putAll(options.headersSafe());
 
         try {
-            restClient.request(path, HttpMethod.POST, body, queryParams, headers);
+            restClient.request(path, HttpMethod.POST, body, queryParams, headers, acceptPartial, useV2Api);
         } catch (InfluxDBApiHttpException e) {
             if (e.statusCode() == HttpResponseStatus.METHOD_NOT_ALLOWED.code()) {
                 if (useV2Api && "api/v2/write".equals(path)) {