Sparks tool TaskMemoryManager WARN

Using ApplyBQSRSpark I experienced the following WARN and it stopped. There were more than 60 GB of RAM free on the server I used at that time, and every time I lauch the command it gives the same output. This is the command that I run using docker:

/gatk/gatk ApplyBQSRSpark \
-I ${INPUT_FILE_BAM} \
--bqsr-recal-file recal_data_.table \
-O /BQSRS_.bam

18/06/13 10:51:15 INFO BlockManagerInfo: Removed broadcast_2_piece0 on 172.17.0.2:44253 in memory (size: 5.7 KB, free: 15.8 GB)
18/06/13 11:04:55 WARN TaskMemoryManager: Failed to allocate a page (8388608 bytes), try again.
18/06/13 11:06:32 WARN NettyRpcEnv: Ignored message: HeartbeatResponse(false)
18/06/13 11:08:03 WARN TaskMemoryManager: Failed to allocate a page (8388608 bytes), try again.
18/06/13 11:09:51 WARN TaskMemoryManager: Failed to allocate a page (8388608 bytes), try again.

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