BenjaminSSL opened a new issue, #1388:
URL: https://github.com/apache/polaris/issues/1388
### Describe the bug
During concurrent parralel http requests of type **CREATE** and **DELETE**
on the catalog and principal entity, while listing catalogs or principals, I am
getting a **NullPointerException**.
Polaris logs show the following:
```
INFO [org.apa.pol.ser.exc.IcebergExceptionMapper] [,POLARIS] [,,,]
(executor-thread-54) Handling runtimeException null
INFO [org.apa.pol.ser.exc.IcebergExceptionMapper] [,POLARIS] [,,,]
(executor-thread-54) Full RuntimeException: java.lang.NullPointerException
ERROR [org.apa.pol.ser.exc.IcebergExceptionMapper] [,POLARIS] [,,,]
(executor-thread-54) Unhandled exception returning INTERNAL_SERVER_ERROR:
java.lang.NullPointerException
```
The returned http status code is **500** and the body for the catalog entity
contains the following:
```
{
"error":
{
"message":null,
"type":"NullPointerException",
"code":500
}
}
```
For the principal entity, the body contains:
```
{
"error":
{
"message":"Cannot invoke
"org.apache.polaris.core.entity.PolarisBaseEntity getCatalogId()" because
"sourceEntity" is null",
"type":"NullPointerException",
"code":500
}
}
```
Stack trace:
```
ERROR [org.apa.pol.ser.exc.IcebergExceptionMapper] [,POLARIS] [,,,]
(executor-thread-52) Unhandled exception returning INTERNAL_SERVER_ERROR:
java.lang.NullPointerException: Cannot invoke
"org.apache.polaris.core.entity.PolarisBaseEntity.getCatalogId()" because
"sourceEntity" is null
at
org.apache.polaris.core.entity.PolarisEntity.<init>(PolarisEntity.java:187)
at
org.apache.polaris.core.entity.PrincipalEntity.<init>(PrincipalEntity.java:26)
at
java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
at
java.base/java.util.AbstractList$RandomAccessSpliterator.forEachRemaining(AbstractList.java:722)
at
java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
at
java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
at
java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:575)
at
java.base/java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260)
at
java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:616)
at
java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:622)
at
java.base/java.util.stream.ReferencePipeline.toList(ReferencePipeline.java:627)
at
org.apache.polaris.service.admin.PolarisServiceImpl.listPrincipals(PolarisServiceImpl.java:256)
at
org.apache.polaris.service.admin.PolarisServiceImpl_ClientProxy.listPrincipals(Unknown
Source)
at
org.apache.polaris.service.admin.api.PolarisPrincipalsApi.listPrincipals(PolarisPrincipalsApi.java:232)
at
org.apache.polaris.service.admin.api.PolarisPrincipalsApi_Subclass.listPrincipals$$superforward(Unknown
Source)
at
org.apache.polaris.service.admin.api.PolarisPrincipalsApi_Subclass$$function$$6.apply(Unknown
Source)
at
io.quarkus.arc.impl.AroundInvokeInvocationContext.proceed(AroundInvokeInvocationContext.java:73)
at
io.quarkus.arc.impl.AroundInvokeInvocationContext.proceed(AroundInvokeInvocationContext.java:62)
at
io.quarkus.micrometer.runtime.MicrometerTimedInterceptor.timedMethod(MicrometerTimedInterceptor.java:79)
at
io.quarkus.micrometer.runtime.MicrometerTimedInterceptor_Bean.intercept(Unknown
Source)
at
io.quarkus.arc.impl.InterceptorInvocation.invoke(InterceptorInvocation.java:42)
at
io.quarkus.arc.impl.AroundInvokeInvocationContext.perform(AroundInvokeInvocationContext.java:30)
at
io.quarkus.arc.impl.InvocationContexts.performAroundInvoke(InvocationContexts.java:27)
at
org.apache.polaris.service.admin.api.PolarisPrincipalsApi_Subclass.listPrincipals(Unknown
Source)
at
org.apache.polaris.service.admin.api.PolarisPrincipalsApi$quarkusrestinvoker$listPrincipals_8247ae723efb90ecd5dc9ca10b28b13ed5c10c1d.invoke(Unknown
Source)
at
org.jboss.resteasy.reactive.server.handlers.InvocationHandler.handle(InvocationHandler.java:29)
at
io.quarkus.resteasy.reactive.server.runtime.QuarkusResteasyReactiveRequestContext.invokeHandler(QuarkusResteasyReactiveRequestContext.java:141)
at
org.jboss.resteasy.reactive.common.core.AbstractResteasyReactiveContext.run(AbstractResteasyReactiveContext.java:147)
at
io.quarkus.vertx.core.runtime.VertxCoreRecorder$15.runWith(VertxCoreRecorder.java:638)
at
org.jboss.threads.EnhancedQueueExecutor$Task.doRunWith(EnhancedQueueExecutor.java:2675)
at
org.jboss.threads.EnhancedQueueExecutor$Task.run(EnhancedQueueExecutor.java:2654)
at
org.jboss.threads.EnhancedQueueExecutor.runThreadBody(EnhancedQueueExecutor.java:1627)
at
org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1594)
at org.jboss.threads.DelegatingRunnable.run(DelegatingRunnable.java:11)
at
org.jboss.threads.ThreadLocalResettingRunnable.run(ThreadLocalResettingRunnable.java:11)
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:1583)
```
### To Reproduce
Setup a test with two threads:
1. Thread A - This thread performs the following operations repeatedly:
- Creates a new **catalog** or **principal**
- Immediately deletes the catalog or principal after creation
2. Thread B - This thread repeatedly invokes the list operation for catalogs
or principals.
Run both threads simultaneously for approximately 10 seconds.
During this time, you may observe occasional failures in the listing
operations. Specifically, the `GET /catalogs` or `GET /principals` endpoints
sometimes throw a **NullPointerException**. However, the issue is not
consistently reproducible, and follows no specific pattern.
These are the endpoints I used for the test, with the host and resource
being `http://localhost:8181/api/management/v1`:
- **Create Catalog**: `POST /catalogs`
- **Delete Catalog**: `DELETE /catalogs/{catalogId}`
- **List Catalogs**: `GET /catalogs`
- **Create Principal**: `POST /principals`
- **Delete Principal**: `DELETE /principals/{principalId}`
- **List Principals**: `GET /principals`
### Actual Behavior
**CREATE** operation sometimes return a **500** error with a
**NullPointerException** in the logs.
It is unclear to me why this is happening, but based on the stack trace, it
seems to be related to the list operation trying to access a catalog or
principal entity that is in the process of being created or deleted by another
thread.
### Expected Behavior
I would expect the list operation return the current state of catalogs or
principal, even if there are concurrent operations happening. The list
operation should be able to handle concurrent modifications gracefully.
### Additional context
Test environment used the in-memory store.
### System information
OS: MacOS Sonoma v15.4.1
Polaris Catalog Version: 1.0.0-incubating-SNAPSHOT
Object Storage: FILE
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