Json serialization is blocking event-loop for too long

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Serializing larger JSONs on the event-loop is becoming an issue.

2024-05-28T12:03:52,860 test houston WARN BlockedThreadChecker - Thread Thread[vert.x-eventloop-thread-2,5,main] has been blocked for 82 ms, time limit is 8 ms
io.vertx.core.VertxException: Thread blocked
	at com.fasterxml.jackson.core.util.TextBuffer.contentsAsString(TextBuffer.java:465) ~[jackson-core-2.13.0.jar:2.13.0]
	at com.fasterxml.jackson.core.io.SegmentedStringWriter.getAndClear(SegmentedStringWriter.java:85) ~[jackson-core-2.13.0.jar:2.13.0]
	at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3828) ~[jackson-databind-2.13.0.jar:2.13.0]
	at io.vertx.core.json.jackson.DatabindCodec.toString(DatabindCodec.java:161) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.json.JsonObject.encode(JsonObject.java:1034) ~[vertx-core-4.5.1.jar:4.5.1]
	at org.swisspush.reststorage.redis.RedisStorage$StorageExpand.lambda$exec$1(RedisStorage.java:711) ~[rest-storage-3.1.1.jar:?]
	at org.swisspush.reststorage.redis.RedisStorage$StorageExpand$$Lambda$2789/0x0000000840a66040.handle(Unknown Source) ~[?:?]
	at io.vertx.core.impl.future.FutureImpl$4.onSuccess(FutureImpl.java:176) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.future.FutureBase.emitSuccess(FutureBase.java:66) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.future.FutureImpl.tryComplete(FutureImpl.java:246) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.future.Transformation$1.onSuccess(Transformation.java:63) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.future.FutureBase.emitSuccess(FutureBase.java:66) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.future.FutureImpl.addListener(FutureImpl.java:231) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.future.Transformation.onSuccess(Transformation.java:44) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.future.FutureBase.lambda$emitSuccess$0(FutureBase.java:60) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.future.FutureBase$$Lambda$1491/0x00000008405d7840.run(Unknown Source) ~[?:?]
	at io.vertx.core.impl.ContextImpl.execute(ContextImpl.java:305) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.DuplicatedContext.execute(DuplicatedContext.java:181) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.future.FutureBase.emitSuccess(FutureBase.java:57) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.future.FutureImpl.tryComplete(FutureImpl.java:246) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.redis.client.impl.RedisStandaloneConnection.handle(RedisStandaloneConnection.java:418) ~[vertx-redis-client-4.5.1.jar:4.5.1]
	at io.vertx.redis.client.impl.RESPParser.handleResponse(RESPParser.java:316) ~[vertx-redis-client-4.5.1.jar:4.5.1]
	at io.vertx.redis.client.impl.RESPParser.handle(RESPParser.java:128) ~[vertx-redis-client-4.5.1.jar:4.5.1]
	at io.vertx.redis.client.impl.RESPParser.handle(RESPParser.java:24) ~[vertx-redis-client-4.5.1.jar:4.5.1]
	at io.vertx.core.net.impl.NetSocketImpl.lambda$new$1(NetSocketImpl.java:101) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.net.impl.NetSocketImpl$$Lambda$1590/0x00000008406b8840.handle(Unknown Source) ~[?:?]
	at io.vertx.core.streams.impl.InboundBuffer.handleEvent(InboundBuffer.java:255) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.streams.impl.InboundBuffer.write(InboundBuffer.java:134) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.net.impl.NetSocketImpl$DataMessageHandler.handle(NetSocketImpl.java:402) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.ContextImpl.emit(ContextImpl.java:335) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.impl.ContextImpl.emit(ContextImpl.java:328) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.net.impl.NetSocketImpl.handleMessage(NetSocketImpl.java:378) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.net.impl.ConnectionBase.read(ConnectionBase.java:159) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.vertx.core.net.impl.VertxHandler.channelRead(VertxHandler.java:153) ~[vertx-core-4.5.1.jar:4.5.1]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442) ~[netty-transport-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440) ~[netty-transport-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) ~[netty-transport-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788) ~[netty-transport-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724) ~[netty-transport-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650) ~[netty-transport-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562) ~[netty-transport-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.103.Final.jar:4.1.103.Final]
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.103.Final.jar:4.1.103.Final]
	at java.lang.Thread.run(Thread.java:829) ~[?:?]