Exceptions of type Error are not handled by the library
jonnyzzz opened this issue · comments
Bug Report
We are using SpringBoot 3.0.6 with an R2DBC driver. Time after time, our application comes to the state where DB connections are not processed at all (pool is leaked or exhausted), just after we see OutOfMemory from DirectBuffers (which does not cause JVM to exit or generate heap dump).
In general, R2DBC is probably leaking some Throwables (at least Errors).
Versions
- Driver: 1.0.0.RELEASE
- Database: PostgresSQL 13.2
- Java: 17
- OS: MacOs
Current Behavior
Stack trace
[reactor-tcp-nio-8] ERROR reactor.netty.channel.ChannelOperationsHandler - [395ce428, L:/[0:0:0:0:0:0:0:1]:57991 - R:localhost/[0:0:0:0:0:0:0:1]:57973] Error was received while reading the incoming data. The connection will be closed.
java.lang.OutOfMemoryError: Cannot reserve 20971520 bytes of direct buffer memory (allocated: 54529, limit: 20971520)
at java.base/java.nio.Bits.reserveMemory(Bits.java:178)
at java.base/java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:121)
at java.base/java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:332)
at io.netty.buffer.UnpooledDirectByteBuf.allocateDirect(UnpooledDirectByteBuf.java:104)
at io.netty.buffer.UnpooledDirectByteBuf.capacity(UnpooledDirectByteBuf.java:156)
at io.netty.buffer.AbstractByteBuf.ensureWritable0(AbstractByteBuf.java:305)
at io.netty.buffer.AbstractByteBuf.setCharSequence0(AbstractByteBuf.java:702)
at io.netty.buffer.AbstractByteBuf.writeCharSequence(AbstractByteBuf.java:1187)
at io.r2dbc.postgresql.util.ByteBufUtils.encode(ByteBufUtils.java:58)
at io.r2dbc.postgresql.codec.StringCodec.lambda$doEncode$0(StringCodec.java:96)
at reactor.core.publisher.MonoSupplier$MonoSupplierSubscription.request(MonoSupplier.java:126)
at reactor.core.publisher.Operators$BaseFluxToMonoOperator.request(Operators.java:2041)
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.request(Operators.java:2305)
at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.request(FluxConcatMapNoPrefetch.java:338)
at reactor.core.publisher.Operators$BaseFluxToMonoOperator.request(Operators.java:2041)
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onSubscribe(MonoFlatMapMany.java:141)
at reactor.core.publisher.Operators$BaseFluxToMonoOperator.onSubscribe(Operators.java:2025)
at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.onSubscribe(FluxConcatMapNoPrefetch.java:164)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:201)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:83)
at reactor.core.publisher.Flux.subscribe(Flux.java:8671)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onNext(FluxFlatMap.java:427)
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyInner.onNext(MonoFlatMapMany.java:250)
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:122)
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2545)
at reactor.core.publisher.FluxMap$MapSubscriber.request(FluxMap.java:164)
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onSubscribeInner(MonoFlatMapMany.java:150)
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyInner.onSubscribe(MonoFlatMapMany.java:245)
at reactor.core.publisher.FluxMap$MapSubscriber.onSubscribe(FluxMap.java:92)
at reactor.core.publisher.FluxJust.subscribe(FluxJust.java:68)
at reactor.core.publisher.FluxDefer.subscribe(FluxDefer.java:54)
at reactor.core.publisher.Flux.subscribe(Flux.java:8671)
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onNext(MonoFlatMapMany.java:195)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:129)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107)
at reactor.core.publisher.Operators$MonoInnerProducerBase.complete(Operators.java:2811)
at reactor.core.publisher.MonoSingle$SingleSubscriber.onComplete(MonoSingle.java:180)
at io.r2dbc.postgresql.util.FluxDiscardOnCancel$FluxDiscardOnCancelSubscriber.onComplete(FluxDiscardOnCancel.java:104)
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onComplete(Operators.java:2205)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondComplete(MonoFlatMap.java:246)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:305)
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79)
at reactor.core.publisher.MonoDelayUntil$DelayUntilCoordinator.complete(MonoDelayUntil.java:418)
at reactor.core.publisher.MonoDelayUntil$DelayUntilTrigger.onComplete(MonoDelayUntil.java:531)
at reactor.core.publisher.MonoIgnoreElements$IgnoreElementsSubscriber.onComplete(MonoIgnoreElements.java:89)
at reactor.core.publisher.FluxConcatIterable$ConcatIterableSubscriber.onComplete(FluxConcatIterable.java:121)
at reactor.core.publisher.MonoIgnoreElements$IgnoreElementsSubscriber.onComplete(MonoIgnoreElements.java:89)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.checkTerminated(FluxFlatMap.java:847)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.drainLoop(FluxFlatMap.java:609)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.drain(FluxFlatMap.java:589)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onComplete(FluxFlatMap.java:466)
at io.r2dbc.postgresql.util.FluxDiscardOnCancel$FluxDiscardOnCancelSubscriber.onComplete(FluxDiscardOnCancel.java:104)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onComplete(FluxMapFuseable.java:152)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onComplete(FluxContextWrite.java:126)
at reactor.core.publisher.FluxWindowPredicate$WindowPredicateMain.checkTerminated(FluxWindowPredicate.java:540)
at reactor.core.publisher.FluxWindowPredicate$WindowPredicateMain.drainLoop(FluxWindowPredicate.java:488)
at reactor.core.publisher.FluxWindowPredicate$WindowPredicateMain.drain(FluxWindowPredicate.java:432)
at reactor.core.publisher.FluxWindowPredicate$WindowPredicateMain.onComplete(FluxWindowPredicate.java:312)
at io.r2dbc.postgresql.util.FluxDiscardOnCancel$FluxDiscardOnCancelSubscriber.onComplete(FluxDiscardOnCancel.java:104)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onComplete(FluxContextWrite.java:126)
at reactor.core.publisher.FluxCreate$BaseSink.complete(FluxCreate.java:460)
at reactor.core.publisher.FluxCreate$BufferAsyncSink.drain(FluxCreate.java:805)
at reactor.core.publisher.FluxCreate$BufferAsyncSink.complete(FluxCreate.java:753)
at reactor.core.publisher.FluxCreate$SerializedFluxSink.drainLoop(FluxCreate.java:247)
at reactor.core.publisher.FluxCreate$SerializedFluxSink.drain(FluxCreate.java:213)
at reactor.core.publisher.FluxCreate$SerializedFluxSink.complete(FluxCreate.java:204)
at io.r2dbc.postgresql.client.ReactorNettyClient$Conversation.complete(ReactorNettyClient.java:671)
at io.r2dbc.postgresql.client.ReactorNettyClient$BackendMessageSubscriber.emit(ReactorNettyClient.java:937)
at io.r2dbc.postgresql.client.ReactorNettyClient$BackendMessageSubscriber.onNext(ReactorNettyClient.java:813)
at io.r2dbc.postgresql.client.ReactorNettyClient$BackendMessageSubscriber.onNext(ReactorNettyClient.java:719)
at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:128)
at reactor.core.publisher.FluxPeekFuseable$PeekConditionalSubscriber.onNext(FluxPeekFuseable.java:854)
at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onNext(FluxMap.java:224)
at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onNext(FluxMap.java:224)
at reactor.netty.channel.FluxReceive.drainReceiver(FluxReceive.java:292)
at reactor.netty.channel.FluxReceive.onInboundNext(FluxReceive.java:401)
at reactor.netty.channel.ChannelOperations.onInboundNext(ChannelOperations.java:411)
at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:113)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:833)
[reactor-tcp-nio-8] ERROR io.r2dbc.postgresql.client.ReactorNettyClient - Connection Error
reactor.netty.ReactorNetty$InternalNettyException: java.lang.OutOfMemoryError: Cannot reserve 20971520 bytes of direct buffer memory (allocated: 54529, limit: 20971520)
Caused by: java.lang.OutOfMemoryError: Cannot reserve 20971520 bytes of direct buffer memory (allocated: 54529, limit: 20971520)
at java.base/java.nio.Bits.reserveMemory(Bits.java:178)
at java.base/java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:121)
at java.base/java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:332)
at io.netty.buffer.UnpooledDirectByteBuf.allocateDirect(UnpooledDirectByteBuf.java:104)
at io.netty.buffer.UnpooledDirectByteBuf.capacity(UnpooledDirectByteBuf.java:156)
at io.netty.buffer.AbstractByteBuf.ensureWritable0(AbstractByteBuf.java:305)
at io.netty.buffer.AbstractByteBuf.setCharSequence0(AbstractByteBuf.java:702)
at io.netty.buffer.AbstractByteBuf.writeCharSequence(AbstractByteBuf.java:1187)
at io.r2dbc.postgresql.util.ByteBufUtils.encode(ByteBufUtils.java:58)
at io.r2dbc.postgresql.codec.StringCodec.lambda$doEncode$0(StringCodec.java:96)
at reactor.core.publisher.MonoSupplier$MonoSupplierSubscription.request(MonoSupplier.java:126)
at reactor.core.publisher.Operators$BaseFluxToMonoOperator.request(Operators.java:2041)
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.request(Operators.java:2305)
at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.request(FluxConcatMapNoPrefetch.java:338)
at reactor.core.publisher.Operators$BaseFluxToMonoOperator.request(Operators.java:2041)
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onSubscribe(MonoFlatMapMany.java:141)
at reactor.core.publisher.Operators$BaseFluxToMonoOperator.onSubscribe(Operators.java:2025)
at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.onSubscribe(FluxConcatMapNoPrefetch.java:164)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:201)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:83)
at reactor.core.publisher.Flux.subscribe(Flux.java:8671)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onNext(FluxFlatMap.java:427)
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyInner.onNext(MonoFlatMapMany.java:250)
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:122)
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2545)
at reactor.core.publisher.FluxMap$MapSubscriber.request(FluxMap.java:164)
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onSubscribeInner(MonoFlatMapMany.java:150)
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyInner.onSubscribe(MonoFlatMapMany.java:245)
at reactor.core.publisher.FluxMap$MapSubscriber.onSubscribe(FluxMap.java:92)
at reactor.core.publisher.FluxJust.subscribe(FluxJust.java:68)
at reactor.core.publisher.FluxDefer.subscribe(FluxDefer.java:54)
at reactor.core.publisher.Flux.subscribe(Flux.java:8671)
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onNext(MonoFlatMapMany.java:195)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:129)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107)
at reactor.core.publisher.Operators$MonoInnerProducerBase.complete(Operators.java:2811)
at reactor.core.publisher.MonoSingle$SingleSubscriber.onComplete(MonoSingle.java:180)
at io.r2dbc.postgresql.util.FluxDiscardOnCancel$FluxDiscardOnCancelSubscriber.onComplete(FluxDiscardOnCancel.java:104)
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onComplete(Operators.java:2205)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondComplete(MonoFlatMap.java:246)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:305)
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79)
at reactor.core.publisher.MonoDelayUntil$DelayUntilCoordinator.complete(MonoDelayUntil.java:418)
at reactor.core.publisher.MonoDelayUntil$DelayUntilTrigger.onComplete(MonoDelayUntil.java:531)
at reactor.core.publisher.MonoIgnoreElements$IgnoreElementsSubscriber.onComplete(MonoIgnoreElements.java:89)
at reactor.core.publisher.FluxConcatIterable$ConcatIterableSubscriber.onComplete(FluxConcatIterable.java:121)
at reactor.core.publisher.MonoIgnoreElements$IgnoreElementsSubscriber.onComplete(MonoIgnoreElements.java:89)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.checkTerminated(FluxFlatMap.java:847)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.drainLoop(FluxFlatMap.java:609)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.drain(FluxFlatMap.java:589)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onComplete(FluxFlatMap.java:466)
at io.r2dbc.postgresql.util.FluxDiscardOnCancel$FluxDiscardOnCancelSubscriber.onComplete(FluxDiscardOnCancel.java:104)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onComplete(FluxMapFuseable.java:152)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onComplete(FluxContextWrite.java:126)
at reactor.core.publisher.FluxWindowPredicate$WindowPredicateMain.checkTerminated(FluxWindowPredicate.java:540)
at reactor.core.publisher.FluxWindowPredicate$WindowPredicateMain.drainLoop(FluxWindowPredicate.java:488)
at reactor.core.publisher.FluxWindowPredicate$WindowPredicateMain.drain(FluxWindowPredicate.java:432)
at reactor.core.publisher.FluxWindowPredicate$WindowPredicateMain.onComplete(FluxWindowPredicate.java:312)
at io.r2dbc.postgresql.util.FluxDiscardOnCancel$FluxDiscardOnCancelSubscriber.onComplete(FluxDiscardOnCancel.java:104)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onComplete(FluxContextWrite.java:126)
at reactor.core.publisher.FluxCreate$BaseSink.complete(FluxCreate.java:460)
at reactor.core.publisher.FluxCreate$BufferAsyncSink.drain(FluxCreate.java:805)
at reactor.core.publisher.FluxCreate$BufferAsyncSink.complete(FluxCreate.java:753)
at reactor.core.publisher.FluxCreate$SerializedFluxSink.drainLoop(FluxCreate.java:247)
at reactor.core.publisher.FluxCreate$SerializedFluxSink.drain(FluxCreate.java:213)
at reactor.core.publisher.FluxCreate$SerializedFluxSink.complete(FluxCreate.java:204)
at io.r2dbc.postgresql.client.ReactorNettyClient$Conversation.complete(ReactorNettyClient.java:671)
at io.r2dbc.postgresql.client.ReactorNettyClient$BackendMessageSubscriber.emit(ReactorNettyClient.java:937)
at io.r2dbc.postgresql.client.ReactorNettyClient$BackendMessageSubscriber.onNext(ReactorNettyClient.java:813)
at io.r2dbc.postgresql.client.ReactorNettyClient$BackendMessageSubscriber.onNext(ReactorNettyClient.java:719)
at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:128)
at reactor.core.publisher.FluxPeekFuseable$PeekConditionalSubscriber.onNext(FluxPeekFuseable.java:854)
at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onNext(FluxMap.java:224)
at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onNext(FluxMap.java:224)
at reactor.netty.channel.FluxReceive.drainReceiver(FluxReceive.java:292)
at reactor.netty.channel.FluxReceive.onInboundNext(FluxReceive.java:401)
at reactor.netty.channel.ChannelOperations.onInboundNext(ChannelOperations.java:411)
at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:113)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:833)
Table schema
Input Code
-- no schema is needed for the example below. Our app may deal with heavy TEXT columns.Steps to reproduce
Input Code
I've created a reproducer for that (with SpringBoot and R2DBC):
@Testcontainers
class R2DBCTest {
@Container
val postgres: PostgreSQLContainer<*> = PostgreSQLContainer("postgres:13.2")
.withDatabaseName("integration-tests-db")
.withUsername("sa")
.withPassword("sa")
@Test
@Timeout(value = 10, unit = TimeUnit.SECONDS, threadMode = ThreadMode.SEPARATE_THREAD)
fun `test oom is handled`() {
Assertions.assertThrows(Throwable::class.java) {
val opts = PostgreSQLR2DBCDatabaseContainer.getOptions(postgres)
val factory = ConnectionFactories.get(opts)
var testMessage = "this_is_test_message"
repeat(30) { repeat ->
testMessage = "$repeat-$testMessage $testMessage" //exp growing
println("Testing SQL for: ${testMessage.length}")
val result = Mono.from(factory.create())
.flatMapMany {
it.createStatement("SELECT ${'$'}1::TEXT as X")
.bind("${'$'}1", testMessage)
.execute()
}.flatMap { it.map { row, _ -> row.get(0, String::class.java) } }
.collectList()
.block() ?: error("No result returned")
assertEquals(testMessage, result.single(), "Testing message size: ${testMessage.length}")
}
}
}
}The problem in the code above is that it is expected to fail with an exception out of block() call, instead it hangs forever.
I do see a netty unhandled exception in the logs.
It is OutOfMemoryError in that case.
Expected behavior/code
All types of Java Throwables are handled, Mono/Flux from Spring reports exceptions, and connections are returned to the pool.