feat(services/hdfs_native): Add read,write,list implementation for hdfs_native #4505

shbhmrzd · 2024-04-19T21:29:50Z

For #3144
Kindly review @Xuanwo

Xuanwo · 2024-04-22T03:01:40Z

.github/services/hdfs/hdfs_native/action.yml

This test should be placed in hdfs_native/hdfs.

Xuanwo · 2024-04-22T03:02:00Z

.github/services/hdfs/hdfs_native/action.yml

+        HADOOP_HOME=${HADOOP_HOME}
+        CLASSPATH=${CLASSPATH}
+        LD_LIBRARY_PATH=${JAVA_HOME}/lib/server:${HADOOP_HOME}/lib/native
+        OPENDAL_HDFS_ROOT=/tmp/opendal/


They should be OPENDAL_HDFS_NATIVE_ROOT

Xuanwo · 2024-04-22T03:06:04Z

core/src/services/hdfs_native/lister.rs

        }
    }
 }

 impl oio::List for HdfsNativeLister {
    async fn next(&mut self) -> Result<Option<Entry>> {
-        todo!()
+        let de: FileStatus = match self.lsi.next().await {


use code like the following for better reading:

let Ok(de) = self .lsi .next() .await .transpose() .map_err(parse_hdfs_error)? else { return Ok(None); };

Xuanwo · 2024-04-22T03:06:55Z

core/src/services/hdfs_native/lister.rs

+
+        let entry = if !de.isdir {
+            let odt = DateTime::from_timestamp(de.modification_time as i64, 0);
+            let dt = match odt {


Please don't match an Option if the None case returns an error, use let-else instead.

Xuanwo · 2024-04-22T03:08:26Z

core/src/services/hdfs_native/reader.rs

-        todo!()
+    async fn read_at(&self, offset: u64, limit: usize) -> Result<Buffer> {
+        // Check for offset being too large for usize on 32-bit systems
+        if offset > usize::MAX as u64 {


Please don't run checks in services.

Where can we put this check ?

Where can we put this check ?

We don't need this check for current. It's more like an upstream issue that can't range from i32::MAX..i64::MAX. You can create an opendal issue to track this.

Sure, created issue #4506

Xuanwo · 2024-04-22T03:08:41Z

core/src/services/hdfs_native/reader.rs

+            .f
+            .read_range(offset as usize, limit)
+            .await
+            .map_err(parse_hdfs_error)


Use ? instead of matching an Result.

Xuanwo · 2024-04-22T03:09:20Z

core/src/services/hdfs_native/writer.rs

+        let bytes = bs.to_bytes();
+        let total_bytes = bytes.len();
+        self.f.write(bytes).await.map_err(parse_hdfs_error)?;
+        Ok(total_bytes)


Does self.f.write() make sure that all bytes are written?

Yes, based on the definition, it continues to write until complete buf has been written.

pub async fn write(&mut self, mut buf: Bytes) -> Result<usize> { let bytes_to_write = buf.len(); // Create a shallow copy of the bytes instance to mutate and track what's been read while !buf.is_empty() { let block_writer = self.get_block_writer().await?; block_writer.write(&mut buf).await?; } self.bytes_written += bytes_to_write; Ok(bytes_to_write) }

Please don't rely this behavior. Return written like this:

let n = self.f.write(bytes).await.map_err(parse_hdfs_error)?; Ok(n)

shbhmrzd · 2024-04-22T09:55:51Z

@Xuanwo
Implemented review comments. Please check now.
Could you also please help with the failure in behavior tests? Thank you!

Xuanwo · 2024-04-23T02:01:33Z

.github/scripts/test_behavior/plan.py

@@ -221,9 +221,10 @@ def generate_language_binding_cases(
 ) -> list[dict[str, str]]:
    cases = unique_cases(cases)

-    # Remove hdfs cases for java.
+    # Remove specified services cases for java.


Please don't touch those files, hdfs_native is pure rust which should be fine on other bindings.

Sure
Due to failures in behaviour tests I was trying a bunch of stuff to figure them out. Could you please help with the failures ?

core/src/types/scheme.rs

Xuanwo · 2024-04-23T03:09:06Z

.github/services/hdfs_native/hdfs/action.yml

+        CLASSPATH=${CLASSPATH}
+        LD_LIBRARY_PATH=${JAVA_HOME}/lib/server:${HADOOP_HOME}/lib/native
+        OPENDAL_HDFS_NATIVE_ROOT=/tmp/opendal/
+        OPENDAL_HDFS_NATIVE_URL=http://127.0.0.1:9000


Only hdfs and viewfs schemes are supported

url should be hdfs://127.0.0.1:9000. It's better to have them tested locally before debugging github actions.

Sorry, missed this one. Thank you for pointing this.

Xuanwo · 2024-04-23T03:10:51Z

core/src/services/hdfs_native/writer.rs

+        let bytes = bs.to_bytes();
+        let total_bytes = bytes.len();
+        self.f.write(bytes).await.map_err(parse_hdfs_error)?;
+        Ok(total_bytes)


Please don't rely this behavior. Return written like this:

let n = self.f.write(bytes).await.map_err(parse_hdfs_error)?; Ok(n)

shbhmrzd added 3 commits April 20, 2024 02:50

implementation for hdfs-native read,write.list

8cfcd8b

add behvaviour tests for hdfs_native

5b8bce6

Merge remote-tracking branch 'upstream/main' into native_hdfs_read_write

1a709df

shbhmrzd requested review from Xuanwo and PsiACE as code owners April 19, 2024 21:29

github-actions bot added the releases-note/feat label Apr 19, 2024

github-actions bot requested a review from morristai April 19, 2024 21:30

fix doc build

e9e417b

shbhmrzd force-pushed the native_hdfs_read_write branch 4 times, most recently from 06417f6 to e9e417b Compare April 19, 2024 23:01

Xuanwo reviewed Apr 22, 2024

View reviewed changes

shbhmrzd added 3 commits April 22, 2024 15:22

review comments

af6e959

Merge remote-tracking branch 'upstream/main' into native_hdfs_read_write

42848ea

review comments

a8a6d17

shbhmrzd force-pushed the native_hdfs_read_write branch from 5f3bb5b to a8a6d17 Compare April 22, 2024 10:24

shbhmrzd added 4 commits April 22, 2024 21:59

use url

5b80bec

Merge remote-tracking branch 'upstream/main' into native_hdfs_read_write

75ef053

use localhost url

bcc4aaf

java bindings hdfs-native

c23d576

shbhmrzd requested a review from tisonkun as a code owner April 22, 2024 16:44

shbhmrzd added 2 commits April 22, 2024 22:32

add hdfs-native scheme

76ea03d

restrict node and python bindings for hdfs-native

a274223

shbhmrzd requested review from messense, Zheaoli and suyanhanx as code owners April 22, 2024 17:09

remove hdfs-native from java binding

b3b4435

Xuanwo reviewed Apr 23, 2024

View reviewed changes

revert scheme and test plan changes

77acd20

Xuanwo reviewed Apr 23, 2024

View reviewed changes

shbhmrzd force-pushed the native_hdfs_read_write branch from a7d2563 to 77acd20 Compare April 23, 2024 04:00

shbhmrzd added 7 commits April 23, 2024 09:36

Merge remote-tracking branch 'upstream/main' into native_hdfs_read_write

c3178c0

Merge remote-tracking branch 'upstream/main' into native_hdfs_read_write

fb8965d

update supporting list, read and write

914ead7

add read, write, list capability in accessor info

63c2919

Merge remote-tracking branch 'upstream/main' into native_hdfs_read_write

3346eef

use read instead of read_range as it panics

e795ffb

revert changes

7be3838

tisonkun removed their request for review May 26, 2024 23:31

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feat(services/hdfs_native): Add read,write,list implementation for hdfs_native #4505

feat(services/hdfs_native): Add read,write,list implementation for hdfs_native #4505

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feat(services/hdfs_native): Add read,write,list implementation for hdfs_native #4505

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feat(services/hdfs_native): Add read,write,list implementation for hdfs_native #4505

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shbhmrzd commented Apr 19, 2024

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shbhmrzd Apr 22, 2024 •

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