I am getting a weird message and the server pauses when it happens

I keep getting this same message over and over and the server pauses every time. Do you know what it is and how to fix it? I am running 1.14.2 build 58

Blockquote[00:08:17 ERROR]: java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
[00:08:17 ERROR]: java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
[00:08:17 ERROR]: net.minecraft.server.v1_14_R1.PlayerChunkMap.save(PlayerChunkMap.java:298)
[00:08:17 ERROR]: net.minecraft.server.v1_14_R1.ChunkProviderServer.save(ChunkProviderServer.java:252)
[00:08:17 ERROR]: net.minecraft.server.v1_14_R1.WorldServer.save(WorldServer.java:770)
[00:08:17 ERROR]: net.minecraft.server.v1_14_R1.MinecraftServer.saveChunks(MinecraftServer.java:672)
[00:08:17 ERROR]: net.minecraft.server.v1_14_R1.MinecraftServer.a(MinecraftServer.java:1079)
[00:08:17 ERROR]: net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:904)
[00:08:17 ERROR]: java.lang.Thread.run(Thread.java:748)
[00:08:17 ERROR]: ------------------------------
[00:08:17 ERROR]: — DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH —
[00:08:17 ERROR]: ------------------------------

Blockquote