Here's the top few lines of the crash log I was supplied with. This never happened while testing in the development environment. This may only be occurring on servers.

Spoiler

1. Time: 2019-08-08 17:45:02 CEST
2. Description: Ticking entity
3.  
4. java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
5.     at com.salvestrom.w2theJungle.mobs.entity.EntityRhinopter.updatePassenger(EntityRhinopter.java:1689)
6.     at net.minecraft.entity.Entity.updateRidden(Entity.java:2020)
7.     at net.minecraft.entity.EntityLivingBase.updateRidden(EntityLivingBase.java:2489)
8.     at com.salvestrom.w2theJungle.mobs.entity.EntityLizardmanBase.updateRidden(EntityLizardmanBase.java:157)
9.     at com.salvestrom.w2theJungle.mobs.entity.EntityLizardmanSticker.updateRidden(EntityLizardmanSticker.java:179)
10.     at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:1988)

And here is the method from the entity file. This was an attempt to give a rider a bobbing effect while mounted. It was mostly successful. Am I doing something wrong with the Minecraft.get Minecraft() call?The line specified by the crash log corresponds to the first usage of Minecraft.getMinecraft. Again this never happens while in the development environment.

Spoiler

    public void updatePassenger(Entity passenger)
    {    	
        if (this.isPassenger(passenger))
        {
        	float f5 = this.prevLimbSwingAmount + (this.limbSwingAmount - this.prevLimbSwingAmount) * 
        			Minecraft.getMinecraft().getRenderPartialTicks();
        	//"Time" in the model file
        	float f6 = this.limbSwing - this.limbSwingAmount * 
        			(1.0F - Minecraft.getMinecraft().getRenderPartialTicks());
        	
        	if (f5 > 1.0F)
            {
                f5 = 1.0F;
            }
        	
        	float f0 = MathHelper.sin(((1.0995574287564276334619251841478f) 
        			+ (f6*1.226612f)) )
        			* (f5);

        	passenger.setPosition(this.posX + 0,
            		this.posY + this.getMountedYOffset() + passenger.getYOffset() 
            		+ (this.isRaptorJumping() ? 0 : f0 * 0.0625),
            		this.posZ - 0);
        }
        
        if (passenger instanceof EntityLiving)
        {
        	EntityLiving entityliving = (EntityLiving)passenger;
        	this.renderYawOffset = entityliving.renderYawOffset;
        }
       
    }

 

 

Spoiler

    public void updatePassenger(Entity passenger)
    {    	
        float f5 = 0;
    	float f6 = 0;

    	if (this.world.isRemote && this.isPassenger(passenger))
        {
    		f5 = this.prevLimbSwingAmount + (this.limbSwingAmount - this.prevLimbSwingAmount) * 
        			Minecraft.getMinecraft().getRenderPartialTicks();
        	//"Time" in the model file
    		f6 = this.limbSwing - this.limbSwingAmount * 
        			(1.0F - Minecraft.getMinecraft().getRenderPartialTicks());
        	
        	if (f5 > 1.0F)
            {
                f5 = 1.0F;
            }
        }
        	float f0 = MathHelper.sin(((1.0995574287564276334619251841478f) 
        			+ (f6*1.226612f)) )
        			* (f5);

        	passenger.setPosition(this.posX + 0,
            		this.posY + this.getMountedYOffset() + passenger.getYOffset() 
            		+ (this.isRaptorJumping() ? 0 : f0 * 0.0625),
            		this.posZ - 0);
        
        
        if (passenger instanceof EntityLiving)
        {
        	EntityLiving entityliving = (EntityLiving)passenger;
        	this.renderYawOffset = entityliving.renderYawOffset;
        }
       
    }

 

This is what I currently have. I had to move the passenger.setPosition outside of the isRemote check because the player was immediately warping back to the position they mounted the entity at on dismounting. I have no idea if this will actually cure the original problem on a server, or if there is some other way around this.

Edited August 8, 20196 yr by salvestrom