Cannot construct instance of java.nio.file.Path with GraalVM Native Image

[tisonkun]

Reproduce

https://github.com/tisonkun/hawkeye/tree/repro-jackson-native

# Use GraalVM 22.3.0
./mvnw clean package -DskipTests -Pnative
./distribution/native/target/hawkeye-native check

... throws:

com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `java.nio.file.Path` (no Creators, like default constructor, exist): abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information
 at [Source: UNKNOWN; byte offset: #UNKNOWN] (through reference chain: io.korandoru.hawkeye.core.HawkEyeConfig$HawkEyeConfigBuilder["baseDir"])
	at com.fasterxml.jackson.databind.DeserializationContext.reportBadDefinition(DeserializationContext.java:1909)
	at com.fasterxml.jackson.databind.DatabindContext.reportBadDefinition(DatabindContext.java:408)
	at com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1354)
	at com.fasterxml.jackson.databind.deser.AbstractDeserializer.deserialize(AbstractDeserializer.java:274)
	at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeSetAndReturn(MethodProperty.java:158)
	at com.fasterxml.jackson.databind.deser.BuilderBasedDeserializer.vanillaDeserialize(BuilderBasedDeserializer.java:293)
	at com.fasterxml.jackson.databind.deser.BuilderBasedDeserializer.deserialize(BuilderBasedDeserializer.java:217)
	at com.fasterxml.jackson.databind.deser.DefaultDeserializationContext.readRootValue(DefaultDeserializationContext.java:323)
	at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4730)
	at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3542)
	at io.korandoru.hawkeye.core.HawkEyeConfig.of(HawkEyeConfig.java:65)
	at io.korandoru.hawkeye.command.HawkEyeCommandCheck.call(HawkEyeCommandCheck.java:42)
	at io.korandoru.hawkeye.command.HawkEyeCommandCheck.call(HawkEyeCommandCheck.java:28)
	at picocli.CommandLine.executeUserObject(CommandLine.java:1953)
	at picocli.CommandLine.access$1300(CommandLine.java:145)
	at picocli.CommandLine$RunLast.executeUserObjectOfLastSubcommandWithSameParent(CommandLine.java:2358)
	at picocli.CommandLine$RunLast.handle(CommandLine.java:2352)
	at picocli.CommandLine$RunLast.handle(CommandLine.java:2314)
	at picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:2179)
	at picocli.CommandLine$RunLast.execute(CommandLine.java:2316)
	at picocli.CommandLine.execute(CommandLine.java:2078)
	at io.korandoru.hawkeye.command.HawkEyeCommandMain.main(HawkEyeCommandMain.java:35)

picocli provides picocli-codegen to generate Native Image configs file. I wonder whether jackson ecosystem has a similar solution or how I can properly config it.

It seems that NioPathDeserializer isn't contained in the final image due to inaccurate dead code analysis.

Ref: korandoru/hawkeye#18

[tisonkun]

Manually add Java7HandlersImpl in reflect-config fix the issue: korandoru/hawkeye#37

But still I expect an automatic tool like picocli-codegen to analyze and generate such a config file for me.

[cowtowncoder]

I think this is due to dynamic loading of support for java.nio.file.Path, originally to allow running Jackson on Java 6 (so Java 7 types were dynamically loaded), but later to keep Android compatibility.

Potentially #3708 merged in 2.15 might help here, possibly solving the problem.
@tisonkun Would it be possible for you to try 2.15.0-SNAPSHOT to see if it might work better?

[tisonkun]

@cowtowncoder It helps.

I try with a commit:

diff --git a/hawkeye-core/pom.xml b/hawkeye-core/pom.xml
index 79c1c3d..f2337a9 100644
--- a/hawkeye-core/pom.xml
+++ b/hawkeye-core/pom.xml
@@ -32,6 +32,16 @@
         <dependency>
             <groupId>com.fasterxml.jackson.dataformat</groupId>
             <artifactId>jackson-dataformat-toml</artifactId>
+            <exclusions>
+                <exclusion>
+                    <groupId>com.fasterxml.jackson.core</groupId>
+                    <artifactId>jackson-databind</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
         </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
diff --git a/hawkeye-core/src/main/resources/META-INF/native-image/hawkeye-core/reflect-config.json b/hawkeye-core/src/main/resources/META-INF/native-imag
e/hawkeye-core/reflect-config.json
index 0347aee..3139dc3 100644
--- a/hawkeye-core/src/main/resources/META-INF/native-image/hawkeye-core/reflect-config.json
+++ b/hawkeye-core/src/main/resources/META-INF/native-image/hawkeye-core/reflect-config.json
@@ -6,13 +6,5 @@
     "allDeclaredMethods": true,
     "allPublicMethods": true,
     "allDeclaredFields": true
-  },
-  {
-    "name": "com.fasterxml.jackson.databind.ext.Java7HandlersImpl",
-    "allDeclaredConstructors": true,
-    "allPublicConstructors": true,
-    "allDeclaredMethods": true,
-    "allPublicMethods": true,
-    "allDeclaredFields": true
   }
 ]
diff --git a/pom.xml b/pom.xml
index bcd8758..b014cf2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -31,6 +31,15 @@
 
     <url>https://github.com/korandoru/hawkeye</url>
 
+    <repositories>
+        <repository>
+            <id>snapshots-repo</id>
+            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+            <releases><enabled>false</enabled></releases>
+            <snapshots><enabled>true</enabled></snapshots>
+        </repository>
+    </repositories>
+
     <licenses>
         <license>
             <name>Apache 2.0 License</name>
@@ -107,6 +116,11 @@
                 <artifactId>jackson-dataformat-toml</artifactId>
                 <version>${jackson-dataformat-toml.version}</version>
             </dependency>
+            <dependency>
+                <groupId>com.fasterxml.jackson.core</groupId>
+                <artifactId>jackson-databind</artifactId>
+                <version>2.15.0-SNAPSHOT</version>
+            </dependency>
             <dependency>
                 <groupId>org.slf4j</groupId>
                 <artifactId>slf4j-api</artifactId>

[tisonkun]

How can I get notified when 2.15.0 released?

[cowtowncoder]

One way is to follow @FasterXML on Twitter; another is

https://groups.google.com/g/jackson-announce

and of course there is Release page itself:

https://github.com/FasterXML/jackson/wiki/Jackson-Release-2.15

where announcement is sent. It will take a while for 2.15 to get released; I hope we can get release candidates out in maybe March 2023.

[tisonkun]

FYI - verified and upgraded korandoru/hawkeye#83