We have below workaround to avoid .tmp file creation under logs folder which is as below.
As this issue was related to bwadmin so we suggested to modify bwadmin-logback file(Configuration file) and the suggested configuration change in logback file is

<fileNamePattern>${BW_LOG_DIR}/bwadmin.log.%d{yyyy-MM-dd HH:mm:ss.SSS}.%i.log</fileNamePattern>

So after this change, the configuration will look like

=========================================================

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="1 minutes">

<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
<file>${BW_LOG_DIR}/bwadmin.log</file>
<append>true</append>
<rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
<!-- rollover daily -->
<fileNamePattern>${BW_LOG_DIR}/bwadmin.log.%d{yyyy-MM-dd HH:mm:ss.SSS}.%i.log</fileNamePattern>

<!-- each file should be at most 100MB, keep 60 days' worth of history, but at most 1GB -->
<maxFileSize>100MB</maxFileSize>
<maxHistory>60</maxHistory>
<totalSizeCap>1GB</totalSizeCap>
</rollingPolicy>
<encoder>
<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level [%thread] %logger{36} - %msg%n</pattern>
</encoder>
</appender>

<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<filter class="ch.qos.logback.classic.filter.ThresholdFilter">
<level>WARN</level>
</filter>
<withJansi>true</withJansi>
<encoder>
<pattern>%d{HH:mm:ss.SSS} %-5level [%thread] %logger{36} - %msg%n</pattern>
</encoder>
</appender>

<contextListener class="ch.qos.logback.classic.jul.LevelChangePropagator">
<resetJUL>true</resetJUL>
</contextListener>

<logger name="org.glassfish.jersey.client.ClientRequest" additivity="false">
<appender-ref ref="FILE"/>
</logger>

<root level="INFO">
<appender-ref ref="STDOUT"/>
<appender-ref ref="FILE"/>
</root>

</configuration>
=========================================================

So, using this configuration change, when a rollover happens for a log file, it will create another log file instead of a .zip file, which will not create any .tmp files anymore.

And in our older behaviour, the flow is like

bwadmin.log->xyz.tmp->bwadmin123.zip

And its configuration is like this

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true">

  <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>${BW_LOG_DIR}/bwadmin.log</file>
    <append>true</append>
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
      <fileNamePattern>${BW_LOG_DIR}/bwadmin.log.%d{yyyy-MM-dd}.log.zip</fileNamePattern>
    </rollingPolicy>
    <encoder>
      <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level [%thread] <%X{operationID}> %logger{36} - %msg%n</pattern>
    </encoder>
  </appender>

  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
      <level>WARN</level>
    </filter>
    <withJansi>true</withJansi>
    <encoder>
      <pattern>%d{HH:mm:ss.SSS} %-5level [%thread] <%X{operationID}> %logger{36} - %msg%n</pattern>
    </encoder>
  </appender>

  <contextListener class="ch.qos.logback.classic.jul.LevelChangePropagator">
    <resetJUL>true</resetJUL>
  </contextListener>
 
  <logger name="org.glassfish.jersey.client.ClientRequest" additivity="false">
    <appender-ref ref="FILE" />
  </logger>
  
  <logger name="org.eclipse.jetty.server.HttpChannel">
  </logger>
  
  <!-- ============================================================= -->
  <!-- *  SQL Driver Logger                                          * -->
  <!-- ============================================================= --> 
  
  <logger name="com.microsoft.sqlserver" level="WARN" additivity="false">
    <appender-ref ref="STDOUT" />
    <appender-ref ref="FILE" />
  </logger>
  
  <!-- ============================================================= -->
  <!-- *  Jetty and Jersey Logger                                    * -->
  <!-- ============================================================= -->  
  
  <logger name="org.eclipse.jetty" level="WARN" additivity="false">
    <appender-ref ref="STDOUT" />
    <appender-ref ref="FILE" />
  </logger>
  
  <logger name="org.glassfish.jersey" level="WARN" additivity="false">
    <appender-ref ref="STDOUT" />
    <appender-ref ref="FILE" />
  </logger>
  
  <!-- ============================================================= -->
  <!-- *  Root Level Logger                                          * -->
  <!-- ============================================================= -->  
 
  <root level="INFO">
    <appender-ref ref="STDOUT" />
    <appender-ref ref="FILE" />
  </root>

</configuration>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Parallel bwadmin run creates TMP log files