JNSimba commented on issue #7387:
URL:
https://github.com/apache/incubator-doris/issues/7387#issuecomment-993198607
> @JNSimba i change the type to varchar, same error. and stacktrace
>
> ```java
> org.apache.doris.flink.backend.BackendClient#openScanner
>
> logger.debug("OpenScanner to '{}', parameter is '{}'.", routing,
openParams);
> if (!isConnected) {
> open();
> }
> TException ex = null;
> for (int attempt = 0; attempt < retries; ++attempt) {
> logger.debug("Attempt {} to openScanner {}.", attempt,
routing);
> try {
> TScanOpenResult result = client.openScanner(openParams);
> if (result == null) {
> logger.warn("Open scanner result from {} is null.",
routing);
> continue;
> }
> ...
> ```
>
> ```shell
> Caused by: java.lang.NullPointerException
> at
org.apache.doris.flink.rest.SchemaUtils.lambda$convertToSchema$0(SchemaUtils.java:36)
> at
java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382)
> at
java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)
> at
org.apache.doris.flink.rest.SchemaUtils.convertToSchema(SchemaUtils.java:36)
> at
org.apache.doris.flink.datastream.ScalaValueReader.<init>(ScalaValueReader.scala:127)
> at
org.apache.doris.flink.table.DorisRowDataInputFormat.open(DorisRowDataInputFormat.java:96)
> at
org.apache.doris.flink.table.DorisRowDataInputFormat.open(DorisRowDataInputFormat.java:45)
> at
org.apache.flink.streaming.api.functions.source.InputFormatSourceFunction.run(InputFormatSourceFunction.java:85)
> at
org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:100)
> at
org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:63)
> at
org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:213)
> ```
>
> the field of TScanColumnDesc, type is null.
Is the data type of doris also **varchar**?
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